SPECIFICATIONS

SECTION 11 53 13

(FORMERLY 11610)

LABORATORY FUME HOODS

RFV2

PART 1 – GENERAL

Summary:

This Specification identifies the minimum material and construction standards that are required to

deliver a quality installation of laboratory fume hoods. Fume hoods shall be supplied in accordance with the

requirements of this Specification. The fume hoods identified in this Specification shall include the

miscellaneous metal panels and other related components as identified on the Drawings and that are

necessary for the complete installation.

Hoods shall function as ventilated, enclosed work spaces, designed to capture, confine and

exhaust fumes, vapours and particulate matter produced or generated within the enclosure.

1.1 SECTION INCLUDES

A. Laboratory Fume Hoods

1.2 RELATED SECTIONS

A. Division 09 Section 65 13, “Resilient Base and Accessories”

B. Division 12 Section 36 00, “Countertops”

C. Division 12 Section 35 53, “Manufactured Metal Casework

D. Division 12 Section 32 00, “Manufactured Wood Casework”

E. Division 13 Section 21 00, “Controlled Environment Rooms”

F. Division 22 Section 40 00, “Plumbing Fixtures”

G. Division 23 Section 30 00, “HVAC Air Distribution”

H. Division 26 Section 05 00, “Common Work Results for Electrical”

I. Related Work To Be Performed By Others:

1. Final installation of all plumbing, service and electrical fixtures attached to fume hood or

countertop (excluding piping and wiring within fume hoods).

2. Final connection to service lines of all plumbing, service and electrical fixtures attached to

laboratory casework or fume hoods.

1.3 REFERENCES

A. SEFA 1-Latest Edition: Laboratory Fume Hoods – Design, Materials, Use and Testing Guidelines

Science Equipment and Furniture Association (SEFA)

B. ISO 9001:2008 – Quality Management

International Standards Organization (ISO)

C. ADA (ATBCB ADAAG) Americans with Disabilities Act Accessibility Guidelines

Americans with Disabilities Act (ADA)

1.4 SUBMITTALS

Refer to Section 01 33 00, “Submittal Procedures,” for requirements, procedures, etc.

A. Product Data:

1. Drawings shall include data and details for construction of the laboratory fume hoods as well

as information regarding the name, quantity, type and construction of materials (such as

hardware, gauges, etc), that will be used to complete the project.

B. Shop Drawings:

1. The laboratory casework manufacturer shall furnish shop drawings illustrating the layout and

placement of all laboratory casework and fume hoods as well as any products included in this

section.

2. Indicate the type and location of all service fittings and associated supply connections.

3. Preparation instructions and recommendations.

4. Storage and handling requirements and recommendations.

5. Installation methods.

C. Selection Samples:

Submit the following:

1. One complete set of color chips representing the manufacturer’s full range of available colors.

Minimum sample size 2 inches by 3 inches (50mm x 76mm).

D. Quality Assurance/Control

1. Design Data/Test Reports: Manufacturer shall submit test data and design criteria which are

in compliance with the project specifications.

2. Performance: Fume Hoods, Sigma Systems “RFV2” model, shall be designed to meet or

exceed the American Standard for Laboratory Ventilation and the American Industrial Hygiene

Association standard as described in ANSI/AIHA Z9.5. This standard of performance shall be

verified through factory testing in accordance with the established protocol as set out by the

ANSI/ASHRAE 110 standard.

3. Certificates: All certifications required in the specifications shall be submitted with the original

submittal package under separate cover. Certificates must be provided with the signature of a

qualified individual of the supplier.

4. Manufacturers’ Instructions: Provide manufacturer’s instructions for installation and

maintenance of all products provided and installed within this section. Instructions will be in

bound form, tabbed and organized by section number.

5. Submit copy of the corrosion resistant label to be attached to the fume hood exterior with

condensed information covering recommended locations for apparatus and accessories.

1.5 QUALITY ASSURANCE

A. Manufacturer Qualifications:

1. The following list of information will be provide to the Architect at least ten (10) days prior to

the bid opening:

2. List of manufacturing facilities;

3. Manufacturer of fume hoods shall have the capability within their facility of performing fume

hood tests based on the latest ANSI/ASHRAE Specification 110.

4. A list of ten (10) installations of comparable stature completed within the past 5 years;

5. Construction details depicting the materials, sizes and methods of construction;

B. Mock-Ups

1. Area mockups shall be as indicated on the shop drawings. Post bid mockup areas must be

priced for disassembly and reassembly and used within the project.

2. Do not proceed with remaining work until installation is approved by Architect.

a) Install base cabinet with specified hardware.

b) Install fume hood with specified fixtures.

1.6 DELIVERY, STORAGE AND HANDLING

A. Packaging, Shipping, Handling and Unloading

1. Packaging: Products shall have packaging adequate enough to protect finished surfaces from

soiling or damage during shipping, delivery and installation.

2. Delivery: Fume hood delivery shall only take place after painting, utility rough-ins and related

activities are completed that could otherwise damage, soil or deteriorate fume hoods in

installation areas.

3. Handling: Care, such as the use of proper moving equipment, experienced movers, etc., shall

be used at all times to avoid damaging the fume hoods. Until installation takes place, any

wrapping, insulation or other method of protection applied to products from the factory will be

left in place to avoid accidental damage.

B. Acceptance at Site:

1. Fume hoods will not be delivered or installed until the conditions specified under Part 3,

Installation section of this document have been met.

C. Storage:

1. Fume hoods shall be stored in the area of installation. If, prior to installation, it is necessary for

the fume hoods to be temporarily stored in an area other than the installation area, the

environmental conditions shall meet the environmental requirements specified under the

Project Site Conditions article of this section.

D. Waste Management and Disposal:

1. The supplier of the laboratory fume hoods are responsible for removing any waste or refuse

resulting from the installation of, or work pertaining to laboratory fume hoods; thereby leaving

the project site clean and free of debris. Trash container(s) to be provided by others.

1.7 PROJECT SITE CONDITIONS

A. Building must be enclosed (windows and doors sealed and weather-tight);

B. An operational HVAC system that maintains temperature and humidity at occupancy levels must

be in place;

C. Adjacent and related work shall be complete;

D. Ceiling, overhead ductwork and lighting must be installed;

E. Site must be free of any further construction such as “wet work”;

F. Required casework must be installed accurately and the project must be ready for fume hood

installation.

1.8 WARRANTY

A. Furnish a written warranty that Work performed under this Section shall remain free from defects

as to materials and workmanship for a period of two (2) years from date of shipment. Defects in

materials and workmanship that may develop within this time are to be replaced without cost or

expense to the Owner.

Defects include, but are not limited to:

1. Ruptured, cracked, or stained coating

2. Discoloration or lack of finish integrity

3. Cracking or peeling of finish

4. Slippage, shift, or failure of attachment to wall, floor, or ceiling

5. Weld or structural failure

6. Warping or unloaded deflection of components

7. Failure of hardware

B. The warranty with respect to products of another manufacturer sold by Mott Manufacturing is

limited to the warranty extended by that manufacturer to Mott Manufacturing.

PART 2 – PRODUCTS

2.1 MANUFACTURER

A. Acceptable Manufacturer:

Mott Manufacturing Ltd.; 452 Hardy Rd. Brantford, ON, Canada N3T 5L8. Tel: (519) 752-7825.

Fax: (519) 752-2895. Email: inquire@mott.ca, www.mott.ca.

B. Substitutions:

Must meet all specification requirements and have prior approval.

C. Requests for substitutions:

All requests will be considered in accordance with provisions of Section 01 60 00.

2.2 FUME HOOD MATERIALS

A. Basic Materials

NOTE: A complete list of basic materials is provided here. Not all models use all materials listed.

1. Exterior Panels, Framing Members, and Furring Panels: Cold rolled and leveled mild steel

and shall conform to ASTM A366, finished as in Para. 2.3.

2. Screws: Interior fastening devices; stainless steel screws complete with corrosion resistant

plastic caps.

3. Upper front Panel: 20 Ga (0.9mm) mild steel, finished same as exterior panels.

4. Lower Foil / Flush sill: Type 316-4 stainless steel powder coated.

5. Safety Glass: Laminated type 6mm (1/4”) thick as per Section 11 53 00.

6. Sash guides: Track shall be corrosion resistant polyvinyl chloride (PVC).

7. Sash Chain: #35 hardened carbon steel roller chain.

8. Sprocket system for Sash Chain: Hardened sprockets with one full width shaft per sash

running in ball bearings.

9. Sash Pull: Type 316, 18 Ga (1.2mm) thick stainless steel with an AISI #4 satin finish.

10. Baffle support brackets: Fiberglass reinforced polyester thermoset resin of 3/16” (5mm)

thickness.

11. Duct Stubs: Bell shaped Type 316, 18 Ga (1.2mm) stainless steel.

12. Light Switches: Light switches shall be black in color, commercial spec grade or higher and

shall be UL and CSA approved.

13. Electrical receptacles: Electrical receptacles shall be black in color, commercial spec grade or

higher and shall be UL and CSA approved.

14. Cover Plates: Electrical cover plates shall be black in color, nylon and UL and CSA approved.

15. Fluorescent Fixture: Fixture shall be two tube rapid start or better. Energy saving cool white

T8 lamps shall be provided. Ballast shall be sound rated to limit noise.

B. Fume Hood Liner

1. FRP:

a) Hood linings and baffles shall be fiberglass reinforced polyester thermoset

resin of 3/16” (5mm) thickness.

b) The fiberglass reinforced polyester panel shall have a minimum flexural

strength of 15,000 psi (103,400 kPa), with a flame spread of 25 or less as per

ASTM #E84.

c) Final appearance shall be smooth and white in color.

2. PVC type:

a) Hood linings and baffles shall be Poly Vinyl Chloride of .” (6mm) thickness.

Final appearance shall be smooth and white in colour.

b) Hood linings and baffles shall be Poly Vinyl Chloride of .” (6mm) thickness

with square corners. Final appearance shall be smooth and white in colour.

3. Stainless steel:

a) 316 s/s square corners.

b) 316 s/s radiused corners.

C. Fume Hood Furring Panels

1. Where called for, provide matching furring panels to enclose the space between top edge of

fume hoods and the finished ceiling.

2. Panels shall be flanged, notched and reinforced where required to form a well-fitted enclosure,

free from oil canning. Secure panels using cadmium-plated, self-tapping screws; panels shall

be removable for maintenance purposes.

3. Front of furring panel shall match fume hood to which it is connected.

2.3 BENCH FUME HOOD CONSTRUCTION

A. Fume hood superstructure shall be double wall construction consisting of an outer shell of sheet

steel and an inner hood liner. Double wall shall house and conceal steel framing members,

attaching brackets and remote operating service fixture mechanisms. Overall double wall

thickness; 4-3/4” (121mm) maximum.

B. Front double-wall posts shall be pre-punched to accept up to 4 plumbing fittings per side, two

electrical duplex outlets, light switch and optional monitor alarm where indicated on drawings.

Electrical outlets and light switch shall be factory-wired and terminate at a junction box on roof of

hood. All electrical components shall be UL listed/classified.

C. Exterior panel members shall be fastened by means of concealed devices. Exposed screws are

not acceptable.

D. Provide access to remote-controlled fixture valves concealed between walls through removable

panels on hood exterior and access panels on both inside liner walls. Assemble hood

superstructure, fasten and connect inner and outer frame into a rigid self supporting entity.

E. Install fluorescent lighting fixture on exterior of roof. Provide a 6mm (1/4”) safety glass panel on

hood "roof", sealed to isolate the lighting fixture from fume chamber. The 2-lamp fixture in each

hood shall be largest possible for fume hood size. Average interior illumination levels within the

fume chamber shall be 80 foot candles minimum. Finish fixture interior with white baked enamel.

F. Hood sash shall raise vertically into an enclosure box to assure a leak free chamber.

G. Fume hood sash shall be full view type providing a clear and unobstructed side to side view of

fume hood interior. Vertical view shall be a minimum of 34” (865mm) above the work surface.

Sash shall be laminated safety glass. Bottom and side sash rails shall be 18 Ga (1.2mm) powder

coated stainless steel. Bottom rail shall be an integral, formed, full width, flush pull and shall be

anchored on each side to sash cables or chains at bottom. Horizontal sliding glass panels shall be

provided in this vertically rising frame complete with flush pulls ground into the glass. A single

weight, chain, bearing and shaft, counter balance system shall be used for vertical operation of

sash and prevent jamming to permit one finger operation at any point along full width sash pull and

to maintain sash at any position without creep. Sash system shall be designed to prevent sash

drop in the event of chain failure. Superstructure shall have a single sash and counter balance

system. Sash shall open and close against rubber bumper stops.

H. Self Closing sash: A mechanism shall be provided which automatically lowers the sash to the

chosen working height (height shall be specified at time of order). A latch shall be provided to hold

the sash fully open for setup/teardown of experiments. Below the chosen working height, the sash

shall be neutrally balanced and function as a conventional sash.

I. Hood shall be low constant volume, reduced face velocity design.

J. Perimeter of sash opening shall have a lower flush sill containment trough and a angled side and

top with angled edge toward hood interior. Air shall enter under the bottom flush sill through a

nominal 1” (25mm) by-pass when the sash is in the closed position. Bottom foil shall be removable

without the use of special tools. Sash shall close in front of flush sill.

K. One-piece baffle shall provide controlled air vectors into and through the fume hood and be

fabricated of the same material as the liner. Provide exhaust slot on the bottom edge of baffle.

L. Design fume hoods to minimize static pressure loss with adequate slot area around the baffle and

the bell shaped exhaust collar configuration. Measured average static pressure loss reading taken

three diameters above the hood outlet from four points, 90o apart, shall not exceed the following

values based on 60” (1524mm) wide hood:

Face Velocity Measured Static Pressure Loss

60 F.P.M. (0.3 m/s) 0.10” (45.8 Pa)

M. Airflow Requirements: RFV2 fume hood is designed to function with the following exhaust volumes

when operating at 60 feet per minute face velocity with a vertical sash opening of 28.5” (725mm)

Hood Size Exhaust Volume Requirements (cubic Feet Per minute)

4 foot (1220mm) 457 cfm

5 foot (1524mm) 600 cfm

6 foot (1829mm) 742 cfm

8 foot (2439mm) 1027 cfm

N. Electrical convenience duplex outlets shown mounted on the face of fume hoods shall be installed

in front posts and pre-wired to a junction box mounted on top of fume hood superstructure.

Electrical devices shall be UL classified/listed.

O. Attach corrosion resistant labels to units as specified in Para. 1.4.D.4

2.4 FLOOR MOUNTED FUME HOOD CONSTRUCTION

A. Fume hood superstructure shall be double wall construction consisting of an outer shell of sheet

steel and an inner hood liner. Double wall shall house and conceal steel framing members,

attaching brackets and remote operating service fixture mechanisms. Overall double wall

thickness; 4-3/4” (121mm) maximum.

B. Floor mounted hoods shall be equipped with two vertically rising sashes in two tracks. Normal

operation shall be with only one sash open. Both sashes shall be opened for set-up and teardown

only.

C. Superstructure shall have a double hung sash and counter balance system. An independent

weight, sprocket, chain, counter balance system shall be used for vertical operation of each sash

and prevent jamming to permit one finger operation at any point along full width sash pull and to

maintain sash at any position without creep. Sash system shall be designed to prevent sash drop

in the event of chain failure.

D. Floor mounted hoods shall not be equipped with a lower airfoil. A one inch gap shall be provided

to prevent vapour build-up behind closed lower sash.

E. All other features of the floor mounted fume hood superstructure are as specified under “Bench

Fume Hood Construction”.

F. Floor mounted hoods shall not be reduced face velocity and shall operate at 100FPM face velocity.

2.5 FUME HOOD EXTERIOR FINISH

A. Coating Performance data is available in Appendix 1

2.6 AIR FLOW MONITOR / ALARM

A. TEL AFA 1001 Mk3 digital airflow alarm or equivalent shall be provided.

PART 3 – EXECUTION

3.1 INSTALLATION

A. In addition to requirements of Section 11 53 13, install fume hoods in positions shown, align and

set level with levelling devices.

B. Work in close cooperation with allied trades installing ductwork, wiring and other services.

C. Apply small bead of sealant to junction of fume hood counter top and adjacent hood liner.

D. Turn over to Mechanical Trades, service fitting remote control rods and valves for installation to

fume hood superstructure and service lines.

MOTT/SIGMA SPEC REV-5 7/06 11 53 13-1

SECTION 11 53 13

(FORMERLY 11610)

OBSERVATION STYLE GLASS WALLED FUME HOODS

PART 1 – GENERAL

This Specification identifies the minimum material and construction standards that are required to

deliver a quality installation of laboratory fume hoods. Fume hoods shall be supplied in accordance with the

requirements of this Specification. The fume hoods identified in this Specification shall include the

miscellaneous metal panels and other related components as identified on the Drawings and that are

necessary for the complete installation.

Hoods shall function as ventilated, enclosed work spaces, designed to capture, confine and

exhaust fumes, vapours and particulate matter produced or generated within the enclosure.

1.1 SECTION INCLUDES

A. Laboratory Fume Hoods

1.2 RELATED SECTIONS

A. Division 09 Section 65 13, “Resilient Base and Accessories”

B. Division 12 Section 36 00, “Countertops”

C. Division 12 Section 35 53, “Manufactured Metal Casework

D. Division 12 Section 32 00, “Manufactured Wood Casework”

E. Division 13 Section 21 00, “Controlled Environment Rooms”

F. Division 22 Section 40 00, “Plumbing Fixtures”

G. Division 23 Section 30 00, “HVAC Air Distribution”

H. Division 26 Section 05 00, “Common Work Results for Electrical”

I. Related Work To Be Performed By Others:

1. Final installation of all plumbing, service and electrical fixtures attached to fume hood or

countertop (excluding piping and wiring within fume hoods).

2. Final connection to service lines of all plumbing, service and electrical fixtures attached to

laboratory casework or fume hoods.

1.3 REFERENCES

A. SEFA 1-2002: Laboratory Fume Hoods – Design, Materials, Use and Testing Guidelines

Science Equipment and Furniture Association (SEFA)

B. ISO 9001:2008 – Quality Management

International Standards Organization (ISO)

C. ADA (ATBCB ADAAG) Americans with Disabilities Act Accessibility Guidelines

Americans with Disabilities Act (ADA)

1.4 SUBMITTALS

Refer to Section 01 33 00, “Submittal Procedures,” for requirements, procedures, etc.

A. Product Data:

1. Drawings shall include data and details for construction of the laboratory fume hoods as well

as information regarding the name, quantity, type and construction of materials (such as

hardware, gauges, etc), that will be used to complete the project.

B. Shop Drawings:

1. The laboratory casework manufacturer shall furnish shop drawings illustrating the layout and

placement of all laboratory casework and fume hoods as well as any products included in this

section.

2. Indicate the type and location of all service fittings and associated supply connections.

3. Preparation instructions and recommendations.

4. Storage and handling requirements and recommendations.

5. Installation methods.

C. Selection Samples:

Submit the following:

1. One complete set of color chips representing the manufacturer’s full range of available colors.

Minimum sample size 2 inches by 3 inches (50mm x 76mm).

D. Quality Assurance/Control

1. Design Data/Test Reports: Manufacturer shall submit test data and design criteria which are

in compliance with the project specifications.

2. Performance: Fume Hoods, Sigma Systems “Observation” model, shall be designed to meet

or exceed the American Standard for Laboratory Ventilation and the American Industrial

Hygiene Association standard as described in ANSI/AIHA Z9.5. This standard of performance

shall be verified through factory testing in accordance with the established protocol as set out

by the ANSI/ASHRAE 110 standard.

3. Certificates: All certifications required in the specifications shall be submitted with the original

submittal package under separate cover. Certificates must be provided with the signature of a

qualified individual of the supplier.

4. Manufacturers’ Instructions: Provide manufacturer’s instructions for installation and

maintenance of all products provided and installed within this section. Instructions will be in

bound form, tabbed and organized by section number.

5. Submit copy of the corrosion resistant label to be attached to the fume hood exterior with

condensed information covering recommended locations for apparatus and accessories.

1.5 QUALITY ASSURANCE

A. Manufacturer Qualifications:

1. The following list of information will be provide to the Architect at least ten (10) days prior to

the bid opening:

2. List of manufacturing facilities;

3. Manufacturer of fume hoods shall have the capability within their facility of performing fume

hood tests based on the latest ANSI/ASHRAE Specification 110.

4. A list of ten (10) installations of comparable stature completed within the past 5 years;

5. Construction details depicting the materials, sizes and methods of construction;

B. Mock-Ups

1. Area mockups shall be as indicated on the shop drawings. Post bid mockup areas must be

priced for disassembly and reassembly and used within the project.

2. Do not proceed with remaining work until installation is approved by Architect.

a) Install base cabinet with specified hardware.

b) Install fume hood with specified fixtures.

1.6 DELIVERY, STORAGE AND HANDLING

A. Packaging, Shipping, Handling and Unloading

1. Packaging: Products shall have packaging adequate enough to protect finished surfaces from

soiling or damage during shipping, delivery and installation.

2. Delivery: Fume hood delivery shall only take place after painting, utility rough-ins and related

activities are completed that could otherwise damage, soil or deteriorate fume hoods in

installation areas.

3. Handling: Care, such as the use of proper moving equipment, experienced movers, etc., shall

be used at all times to avoid damaging the fume hoods. Until installation takes place, any

wrapping, insulation or other method of protection applied to products from the factory will be

left in place to avoid accidental damage.

B. Acceptance at Site:

1. Fume hoods will not be delivered or installed until the conditions specified under Part 3,

Installation section of this document have been met.

C. Storage:

1. Fume hoods shall be stored in the area of installation. If, prior to installation, it is necessary for

the fume hoods to be temporarily stored in an area other than the installation area, the

environmental conditions shall meet the environmental requirements specified under the

Project Site Conditions article of this section.

D. Waste Management and Disposal:

1. The supplier of the laboratory fume hoods are responsible for removing any waste or refuse

resulting from the installation of, or work pertaining to laboratory fume hoods; thereby leaving

the project site clean and free of debris. Trash container(s) to be provided by others.

1.7 PROJECT SITE CONDITIONS

A. Building must be enclosed (windows and doors sealed and weather-tight);

B. An operational HVAC system that maintains temperature and humidity at occupancy levels must

be in place;

C. Adjacent and related work shall be complete;

D. Ceiling, overhead ductwork and lighting must be installed;

E. Site must be free of any further construction such as “wet work”;

F. Required casework must be installed accurately and the project must be ready for fume hood

installation.

1.8 WARRANTY

A. Furnish a written warranty that Work performed under this Section shall remain free from defects

as to materials and workmanship for a period of two (2) years from date of shipment. Defects in

materials and workmanship that may develop within this time are to be replaced without cost or

expense to the Owner.

Defects include, but are not limited to:

1. Ruptured, cracked, or stained coating

2. Discoloration or lack of finish integrity

3. Cracking or peeling of finish

4. Slippage, shift, or failure of attachment to wall, floor, or ceiling

5. Weld or structural failure

6. Warping or unloaded deflection of components

7. Failure of hardware

B. The warranty with respect to products of another manufacturer sold by Mott Manufacturing is

limited to the warranty extended by that manufacturer to Mott Manufacturing.

PART 2 – PRODUCTS

2.1 MANUFACTURER

A. Acceptable Manufacturer:

Mott Manufacturing Ltd.; 452 Hardy Rd. Brantford, ON, Canada N3T 5L8. Tel: (519) 752-7825.

Fax: (519) 752-2895. Email: inquire@mott.ca, www.mott.ca.

Basis of Design: Mott Manufacturing Observation Fume Hood

B. Substitutions:

Must meet all specification requirements and have prior approval.

C. Requests for substitutions:

All requests will be considered in accordance with provisions of Section 01 60 00.

2.2 FUME HOOD MATERIALS

A. Basic Materials

NOTE: A complete list of basic materials is provided here. Not all models use all materials listed.

1. Exterior Panels Framing Members, and Furring Panels: Cold rolled and levelled mild steel and

shall conform to ASTM A1008/A1008M, finished as in Para. 2.4.

2. Screws: Interior fastening devices; stainless steel screws complete with corrosion resistant

plastic caps.

3. By-Pass: 18 Ga (1.2mm) thick mild steel downward directional, finished same as exterior

panels.

4. Upper front panel: to be 18 Ga (1.2mm) thick mild steel hinged front panel for access to area

above fume hood chamber finished same as exterior panels.

5. Lower Foil: For hoods, form using 14 Ga (1.9mm) Type 316-4 stainless steel.

6. Lower Foil / Flush sill: Type 316-4 stainless steel powder coated.

7. All glass panels shall be Safety Glass: Laminated type 6mm (1/4”) thick as per Section 11 53

00.

8. Sash guides: Track shall be corrosion resistant polyvinyl chloride (PVC).

9. Sash Cable: 3/32” (2mm) stranded stainless steel 7 x 19 construction tested to at least

100,000 cycles.

10. Sash Pull: Type 316, 18 Ga (1.2mm) thick stainless steel with an AISI #4 satin finish.

11. Pulley Assembly For Sash Cable: 1-1/2” (38mm) diameter nylon rim, ball bearing roller, with

cable retaining device. Provide interior access panels on both sides, and secure using special

moulded white vinyl gasket designed to be removed and reinstalled without use of special

tools.

12. Baffle/plenum: Interior to chamber shall be 18 Ga. metal per either of the following with no

exceptions:

i. Mild cold rolled steel that has been galvanized or galvannealed and epoxy

painted to match the rest of the fume hood.

ii. Type 316 stainless steel that is epoxy painted to match the rest of the hood.

13. Duct Stubs: Rectangular Type 316, 18 Ga (1.2mm) stainless steel.

14. Light Switches: Light switches shall be black in color, commercial spec grade or higher and

shall be UL and CSA approved and shall not be part of the fume hood superstructure.

15. Electrical receptacles: Electrical receptacles shall be black in color, commercial spec grade or

higher and shall be UL and CSA approved and shall not be part of the fume hood

superstructure.

16. Cover Plates: Electrical cover plates shall be black in color, nylon and UL and CSA approved.

17. Flourescent Fixture: Fixture shall be two tube rapid start or better. Energy saving cool white

T8 lamps shall be provided. Ballast shall be sound rated to limit noise.

B. Fume Hood Interior

1. Glass: All glass panels shall be Safety Glass, laminated type 6mm (1/4”) thick as per Section

11 53 00

a) Hood linings and baffles shall be Poly Vinyl Chloride of .” (6mm) thickness.

Final appearance shall be smooth and white in colour.

b) Hood linings and baffles shall be Poly Vinyl Chloride of .” (6mm) thickness

with square corners. Final appearance shall be smooth and white in colour.

2. Metal: Shall be 18 Ga. metal per 2.2.A.12 above

C. Fume Hood Furring Panels

1. Where called for, provide matching furring panels to enclose the space between top edge of

fume hoods and the finished ceiling.

2. Panels shall be flanged, notched and reinforced where required to form a well-fitted enclosure,

free from oilcanning. Secure panels using cadmium-plated, self-tapping screws; panels shall

be removable for maintenance purposes.

3. Finish shall match fume hood to which it is connected.

2.3 FUME HOOD CONSTRUCTION

A. Units may be double or single chamber.

B. Fume hood superstructure shall be single wall construction consisting of sheet steel and laminated

safety glass.

C. Rear baffle/plenum shall be designed to accept service outlets in a fashion that meets national and

local codes.

D. Exterior and interior members shall be fastened by means that conceal all screws. Exposed

screws are not acceptable.

E. Provide access to remote-controlled fixture valves via a space provided beneath the fume hood

chamber in either cabinetry or an interstitial space between the fume hood chamber and the

support cabinets below.

F. Install fluorescent lighting fixture on exterior of roof. Provide a 6mm (1/4”) safety glass panel on

hood "roof", sealed to isolate the lighting fixture from fume chamber. The 2-lamp fixture in each

hood shall be largest possible for fume hood size. Average interior illumination levels within the

fume chamber shall be 80 foot candles minimum. Finish fixture interior with white baked enamel.

G. Fume hood sash(s) shall be full view self closing type providing a clear and unobstructed side to

side view of fume hood interior. Sash shall be laminated safety glass set into extruded polyvinyl

chloride guide. Bottom and side sash rails shall be 18 Ga (1.2mm) stainless steel. Glass shall be

set into rails with PVC glazing channel. Bottom rail shall be an integral, formed, full width, flush pull

and shall be anchored on each side to sash cables at bottom. A single weight, pulley, cable,

counter balance system shall be used for vertical operation of sash and prevent jamming to permit

one finger operation at any point along full width sash pull and to maintain sash at any position

without creep. Sash system shall be designed to prevent sash drop in the event of cable failure.

Superstructure shall have a single sash and counter balance system. Sash shall open and close

against rubber bumper stops.

H. Self Closing sash: A mechanism shall be provided which automatically lowers the sash to the

chosen working height (height shall be specified at time of order). A latch shall be provided to hold

the sash fully open for setup/teardown of experiments. Below the chosen working height, the sash

shall be neutrally balanced and function as a conventional sash.

I. Hood shall be constant volume type with a built in automatic compensating by-pass to maintain

constant exhaust volume regardless of sash position. By-pass shall be positive in action, and

controlled by shaped panel in the area immediately above the top portion of the sash when closed.

As the sash is lowered, the by-pass design limits the increase in face velocity to a maximum of 4-

1/2 times average face velocity as measured with the sash fully open.

J. Restricted Bypass Option: Standard front panel shall be supplemented by the addition of an

adjustable panel behind the by-pass panel area. Adjustable panel shall be made of stainless steel

grade 316 or fiberglass reinforced polyester. It shall be possible to achieve bypass opening

ranging from a nominal 25mm (1”) to the maximum available opening of 406mm (16”). Lower edge

of the adjustable bypass panel shall be equipped with a flexible rubberized fabric flap to reduce

leakage. The adjustable bypass panel shall be moved to the final setting by the ventilation

contractor who is responsible for fume hood controls. CONTACT MANUFACTURER WHEN A

VARIABLE AIR VOLUME SYSTEM IS IN USE.

K. Perimeter of sash opening shall have a lower air foil and streamlined shape side and top with

angled opening toward hood interior. Air shall enter under the bottom horizontal foil through a

nominal 1” (25mm) by-pass when the sash is in the closed position. Bottom foil shall be removable

without the use of special tools. Sash shall close on air foil. Floor mounted hoods shall not be

equipped with a lower airfoil. A one inch gap shall be provided to prevent vapour build-up behind

closed lower sash.

L. Air shall enter under the bottom flush sill through a nominal 1” (25mm) by-pass when the sash is in

the closed position. Bottom foil shall be removable without the use of special tools. Sash shall

close on flush sill.

M. The main baffles/plenums shall provide controlled air vectors into and through the fume hood and

be fabricated of the same material as noted in 2.2.A.12 above. Provide exhaust slots on the full

perimeter of baffles or plenums.

N. For safety, fume hood shall maintain essentially constant exhaust volume at any baffle position.

Changes in average face velocity and exhaust volume as a result of baffle adjustment shall not

exceed 5% for any baffle position at the specified face velocity.

O. Design fume hoods to minimize static pressure loss with adequate slot area around the baffle and

the rectangular shaped exhaust collar configuration. Measured average static pressure loss

reading taken three diameters above the hood outlet from four points, 90o apart, shall not exceed

the following values based on 60” (1524mm) wide hood:

Face Velocity Measured Static Pressure Loss

100 F.P.M. (0.51 m/s) 0.40-0.50” depending on hood width

P. Airflow Requirements: Observation fume hood is designed to function with the following exhaust

volumes when operating at 100 feet per minute face velocity with a vertical sash opening of two

sashes open to 18” on both sides. Single sided units would exhaust 50% of the volumes noted

below.

Hood Size Exhaust Volume Requirements (cubic Feet Per minute)

4 foot (1220mm) 1100 cfm

5 foot (1524mm) 1400 cfm

6 foot (1829mm) 1700 cfm

Q. Attach corrosion resistant labels to units as specified in Para. 1.4.D.4

2.4 FUME HOOD EXTERIOR FINISH

A. Coating Performance data is available in Appendix 1

2.5 AIR FLOW MONITOR / ALARM

A. TEL AFA 1001 Mk3 digital airflow alarm or equivalent shall be provided.

PART 3 – EXECUTION

INSTALLATION

A. In addition to requirements of Section 11 53 13, install fume hoods in positions shown, align and

set level with levelling devices.

B. Work in close cooperation with allied trades installing ductwork, wiring and other services.

C. Apply small bead of sealant to junction of fume hood counter top and adjacent hood liner.

D. Turn over to Mechanical Trades, service fitting remote control rods and valves for installation to

fume hood superstructure and service lines.

MOTT/SIGMA SPEC REV-7 2/09 11 53 13-1

SECTION 11 53 13

(FORMERLY 11610)

LABORATORY FUME HOODS

Double sided Demonstration hoods with upper baffle option

PART 1 – GENERAL

Summary:

This Specification identifies the minimum material and construction standards that are required to

deliver a quality installation of laboratory fume hoods. Fume hoods shall be supplied in accordance with the

requirements of this Specification. The fume hoods identified in this Specification shall include the

miscellaneous metal panels and other related components as identified on the Drawings and that are

necessary for the complete installation.

Hoods shall function as ventilated, enclosed work spaces, designed to capture, confine and

exhaust fumes, vapours and particulate matter produced or generated within the enclosure.

1.1 SECTION INCLUDES

A. Laboratory Fume Hoods

1.2 RELATED SECTIONS

A. Division 09 Section 65 13, “Resilient Base and Accessories”

B. Division 12 Section 36 00, “Countertops”

C. Division 12 Section 35 53, “Manufactured Metal Casework

D. Division 12 Section 32 00, “Manufactured Wood Casework”

E. Division 13 Section 21 00, “Controlled Environment Rooms”

F. Division 22 Section 40 00, “Plumbing Fixtures”

G. Division 23 Section 30 00, “HVAC Air Distribution”

H. Division 26 Section 05 00, “Common Work Results for Electrical”

I. Related Work To Be Performed By Others:

1. Final installation of all plumbing, service and electrical fixtures attached to fume hood or

countertop (excluding piping and wiring within fume hoods).

2. Final connection to service lines of all plumbing, service and electrical fixtures attached to

laboratory casework or fume hoods.

1.3 REFERENCES

A. SEFA 1-2002: Laboratory Fume Hoods – Design, Materials, Use and Testing Guidelines

Science Equipment and Furniture Association (SEFA)

B. ISO 9001:2008 – Quality Management

International Standards Organization (ISO)

C. ADA (ATBCB ADAAG) Americans with Disabilities Act Accessibility Guidelines

Americans with Disabilities Act (ADA)

1.4 SUBMITTALS

Refer to Section 01 33 00, “Submittal Procedures,” for requirements, procedures, etc.

A. Product Data:

1. Drawings shall include data and details for construction of the laboratory fume hoods as well

as information regarding the name, quantity, type and construction of materials (such as

hardware, gauges, etc), that will be used to complete the project.

B. Shop Drawings:

1. The laboratory casework manufacturer shall furnish shop drawings illustrating the layout and

placement of all laboratory casework and fume hoods as well as any products included in this

section.

2. Indicate the type and location of all service fittings and associated supply connections.

3. Preparation instructions and recommendations.

4. Storage and handling requirements and recommendations.

5. Installation methods.

C. Selection Samples:

Submit the following:

1. One complete set of color chips representing the manufacturer’s full range of available colors.

Minimum sample size 2 inches by 3 inches (50mm x 76mm).

D. Quality Assurance/Control

1. Design Data/Test Reports: Manufacturer shall submit test data and design criteria which are

in compliance with the project specifications.

2. Performance: Fume Hoods, Sigma Systems “Pro” model, shall be designed to meet or exceed

the American Standard for Laboratory Ventilation and the American Industrial Hygiene

Association standard as described in ANSI/AIHA Z9.5. This standard of performance shall be

verified through factory testing in accordance with the established protocol as set out by the

ANSI/ASHRAE 110 standard.

3. Certificates: All certifications required in the specifications shall be submitted with the original

submittal package under separate cover. Certificates must be provided with the signature of a

qualified individual of the supplier.

4. Manufacturers’ Instructions: Provide manufacturer’s instructions for installation and

maintenance of all products provided and installed within this section. Instructions will be in

bound form, tabbed and organized by section number.

5. Submit copy of the corrosion resistant label to be attached to the fume hood exterior with

condensed information covering recommended locations for apparatus and accessories.

1.5 QUALITY ASSURANCE

A. Manufacturer Qualifications:

1. The following list of information will be provide to the Architect at least ten (10) days prior to

the bid opening:

2. List of manufacturing facilities;

3. Manufacturer of fume hoods shall have the capability within their facility of performing fume

hood tests based on the latest ANSI/ASHRAE Specification 110.

4. A list of ten (10) installations of comparable stature completed within the past 5 years;

5. Construction details depicting the materials, sizes and methods of construction;

B. Mock-Ups

1. Area mockups shall be as indicated on the shop drawings. Post bid mockup areas must be

priced for disassembly and reassembly and used within the project.

2. Do not proceed with remaining work until installation is approved by Architect.

a) Install base cabinet with specified hardware.

b) Install fume hood with specified fixtures.

1.6 DELIVERY, STORAGE AND HANDLING

A. Packaging, Shipping, Handling and Unloading

1. Packaging: Products shall have packaging adequate enough to protect finished surfaces from

soiling or damage during shipping, delivery and installation.

2. Delivery: Fume hood delivery shall only take place after painting, utility rough-ins and related

activities are completed that could otherwise damage, soil or deteriorate fume hoods in

installation areas.

3. Handling: Care, such as the use of proper moving equipment, experienced movers, etc., shall

be used at all times to avoid damaging the fume hoods. Until installation takes place, any

wrapping, insulation or other method of protection applied to products from the factory will be

left in place to avoid accidental damage.

B. Acceptance at Site:

1. Fume hoods will not be delivered or installed until the conditions specified under Part 3,

Installation section of this document have been met.

C. Storage:

1. Fume hoods shall be stored in the area of installation. If, prior to installation, it is necessary for

the fume hoods to be temporarily stored in an area other than the installation area, the

environmental conditions shall meet the environmental requirements specified under the

Project Site Conditions article of this section.

D. Waste Management and Disposal:

1. The supplier of the laboratory fume hoods are responsible for removing any waste or refuse

resulting from the installation of, or work pertaining to laboratory fume hoods; thereby leaving

the project site clean and free of debris. Trash container(s) to be provided by others.

1.7 PROJECT SITE CONDITIONS

A. Building must be enclosed (windows and doors sealed and weather-tight);

B. An operational HVAC system that maintains temperature and humidity at occupancy levels must

be in place;

C. Adjacent and related work shall be complete;

D. Ceiling, overhead ductwork and lighting must be installed;

E. Site must be free of any further construction such as “wet work”;

F. Required casework must be installed accurately and the project must be ready for fume hood

installation.

1.8 WARRANTY

A. Furnish a written warranty that Work performed under this Section shall remain free from defects

as to materials and workmanship for a period of two (2) years from date of shipment. Defects in

materials and workmanship that may develop within this time are to be replaced without cost or

expense to the Owner.

Defects include, but are not limited to:

1. Ruptured, cracked, or stained coating

2. Discoloration or lack of finish integrity

3. Cracking or peeling of finish

4. Slippage, shift, or failure of attachment to wall, floor, or ceiling

5. Weld or structural failure

6. Warping or unloaded deflection of components

7. Failure of hardware

B. The warranty with respect to products of another manufacturer sold by Mott Manufacturing is

limited to the warranty extended by that manufacturer to Mott Manufacturing.

PART 2 – PRODUCTS

2.1 MANUFACTURER

A. Acceptable Manufacturer:

Mott Manufacturing Ltd.; 452 Hardy Rd. Brantford, ON, Canada N3T 5L8. Tel: (519) 752-7825.

Fax: (519) 752-2895. Email: inquire@mott.ca, www.mott.ca.

B. Substitutions:

Must meet all specification requirements and have prior approval.

C. Requests for substitutions:

All requests will be considered in accordance with provisions of Section 01 60 00.

2.2 FUME HOOD MATERIALS

A. Basic Materials

NOTE: A complete list of basic materials is provided here. Not all models use all materials listed.

1. Exterior Panels Framing Members, and Furring Panels: Cold rolled and levelled mild steel and

shall conform to ASTM A1008/A1008M, finished as in Para. 2.4.

2. Screws: Interior fastening devices; stainless steel screws complete with corrosion resistant

plastic caps.

3. By-Pass Grilles: 18 Ga (1.2mm) thick mild steel directionally louvered upward, finished same

as exterior panels.

4. Lower Foil: For hoods, form using 14 Ga (1.9mm) Type 316-4 stainless steel.

5. Safety Glass: Laminated type 6mm (1/4”) thick as per Section 11 53 00.

6. Sash guides: Track shall be corrosion resistant polyvinyl chloride (PVC).

7. Sash Cable: 3/32” (2mm) stranded stainless steel 7 x 19 construction.

8. Sash Pull: Type 316, 18 Ga (1.2mm) thick stainless steel with an AISI #4 satin finish.

9. Pulley Assembly For Sash Cable: 1-1/2” (38mm) diameter nylon rim, ball bearing roller, with

cable retaining device. Provide interior access panels on both sides, and secure using special

moulded white vinyl gasket designed to be removed and reinstalled without use of special

tools.

10. Baffle support brackets: Fiberglass reinforced polyester thermoset resin of 3/16” (5mm)

thickness.

11. Duct Stubs: Bell shaped Type 316, 18 Ga (1.2mm) stainless steel.

12. Light Switches: Light switches shall be black in color, commercial spec grade or higher and

shall be UL and CSA approved.

13. Electrical receptacles: Electrical receptacles shall be black in color, commercial spec grade or

higher and shall be UL and CSA approved.

14. Cover Plates: Electrical cover plates shall be black in color, nylon and UL and CSA approved.

15. Flourescent Fixture: Fixture shall be two tube rapid start or better. Energy saving cool white

T8 lamps shall be provided. Ballast shall be sound rated to limit noise.

B. Fume Hood Liner

1. FRP: Hood linings and baffles shall be fiberglass reinforced polyester thermoset resin of 3/16”

(5mm) thickness. The fiberglass reinforced polyester panel shall have a minimum flexural

strength of 15,000 psi (103,400 kPa), with a flame spread of 25 or less as per ASTM #E84.

Final appearance shall be smooth and white in colour.

C. Fume Hood Furring Panels

1. Where called for, provide matching furring panels to enclose the space between top edge of

fume hoods and the finished ceiling.

2. Panels shall be flanged, notched and reinforced where required to form a well-fitted enclosure,

free from oilcanning. Secure panels using cadmium-plated, self-tapping screws; panels shall

be removable for maintenance purposes.

3. Finish shall match fume hood to which it is connected.

2.3 BENCH FUME HOOD CONSTRUCTION

A. Fume hood superstructure shall be double wall construction consisting of an outer shell of sheet

steel and an inner hood liner. Double wall shall house and conceal steel framing members,

attaching brackets and remote operating service fixture mechanisms. Overall double wall

thickness; 4-3/4” (121mm) maximum.

B. Front double-wall posts shall be pre-punched to accept up to 5 plumbing fittings per side, two

electrical duplex outlets, light switch and optional monitor alarm where indicated on drawings.

Electrical outlets and light switch shall be factory-wired and terminate at a junction box on roof of

hood. All electrical components shall be UL listed/classified.

C. Exterior panel members shall be fastened by means of concealed devices. Exposed screws are

not acceptable.

D. Provide access to remote-controlled fixture valves concealed between walls through removable

panels on hood exterior and access panels on both inside liner walls. Assemble hood

superstructure, fasten and connect inner and outer frame into a rigid self supporting entity.

E. Install fluorescent lighting fixture on exterior of roof. Provide a 6mm (1/4”) safety glass panel on

hood "roof", sealed to isolate the lighting fixture from fume chamber. The 2-lamp fixture in each

hood shall be largest possible for fume hood size. Average interior illumination levels within the

fume chamber shall be 80 foot candles minimum. Finish fixture interior with white baked enamel.

F. Fume hood sash(s) shall be full view type providing a clear and unobstructed side to side view of

fume hood interior. Sash shall be laminated safety glass set into extruded polyvinyl chloride guide.

Bottom and side sash rails shall be 18 Ga (1.2mm) stainless steel. Glass shall be set into rails with

PVC glazing channel. Bottom rail shall be an integral, formed, full width, flush pull and shall be

anchored on each side to sash cables at bottom. A single weight, pulley, cable, counter balance

system shall be used for vertical operation of each sash and prevent jamming to permit one finger

operation at any point along full width sash pull and to maintain sash at any position without creep.

Sash system shall be designed to prevent sash drop in the event of cable failure. Superstructure

shall have one sash on each side of hood. Sash shall open and close against rubber bumper

stops. Counterweights shall be located in the end of the hood. Sashes on double sided hoods

shall be equipped with an interlock mechanism to ensure that only one sash may be opened at a

time.

G. Hood shall be constant volume type with a built in automatic compensating by-pass to maintain

constant exhaust volume regardless of sash position. By-pass shall be positive in action, and

controlled by louvered panel in the area immediately above the top portion of the sash when

closed. As the sash is lowered, the by-pass design limits the increase in face velocity to a

maximum of 4-1/2 times average face velocity as measured with the sash fully open.

H. Restricted Bypass Option: Standard front panel shall be supplemented by the addition of an

adjustable panel behind louvered area. Adjustable panel shall be made of stainless steel grade

316 or fiberglass reinforced polyester. It shall be possible to achieve bypass opening ranging from

a nominal 25mm (1”) to the maximum available opening of 406mm (16”). Lower edge of the

adjustable bypass panel shall be equipped with a flexible rubberized fabric flap to reduce leakage.

The adjustable bypass panel shall be moved to the final setting by the ventilation contractor who is

responsible for fume hood controls.

I. Perimeter of sash opening shall have a lower air foil and streamlined shape side and top with

angled opening toward hood interior. Air shall enter under the bottom horizontal foil through a

nominal 1” (25mm) by-pass when the sash is in the closed position. Bottom foil shall be removable

without the use of special tools. Sash shall close on air foil.

J. Hood shall be equipped with “V” shaped upper baffles sized to provide three nominal 1” wide air

intake slots. Demonstration hood are not equipped with lower baffles.

K. Design fume hoods to minimize static pressure loss with adequate slot area around the baffle and

the exhaust collar. Measured average static pressure loss reading taken three diameters above

the hood outlet from four points, 90o apart, shall not exceed the following values based on 60”

(1524mm) wide hood:

Face Velocity Measured Static Pressure Loss

75 F.P.M. (0.38 m/s) 0.15” (45.8 Pa)

100 F.P.M. (0.51 m/s) 0.20” (87.1 Pa)

125 F.P.M. (0.64 m/s) 0.25” (136.9 Pa)

L. Electrical convenience duplex outlets shown mounted on the face of fume hoods shall be installed

in front posts and pre-wired to a junction box mounted on top of fume hood superstructure.

Electrical devices shall be UL classified/listed.

M. Attach corrosion resistant labels to units as specified in Para. 1.4.D.4

N. Double sided hoods shall be equipped with a fixed viewing window in one end of 6mm laminated

safety glass. Window shall be a minimum of 18 x 24 inches.

2.4 FUME HOOD EXTERIOR FINISH

A. Coating Performance data is available in Appendix 1

2.5 AIR FLOW MONITOR / ALARM

A. TEL AFA 1001 Mk3 digital airflow alarm or equivalent shall be provided.

PART 3 – EXECUTION

3.1 INSTALLATION

A. In addition to requirements of Section 11 53 13, install fume hoods in positions shown, align and

set level with levelling devices.

B. Work in close cooperation with allied trades installing ductwork, wiring and other services.

C. Apply small bead of sealant to junction of fume hood counter top and adjacent hood liner.

D. Turn over to Mechanical Trades, service fitting remote control rods and valves for installation to

fume hood superstructure and service lines.

MOTT SAFEGUARD FUME HOOD SPEC REV-1 06/10 11 53 13-1

SECTION 11 53 13

SAFEGUARD LABORATORY FUME HOODS

PART 1 – GENERAL

Summary:

This Specification identifies the minimum material and construction standards that are required to deliver a quality installation of laboratory fume hoods. Fume hoods shall be supplied in accordance with the requirements of this Specification. The fume hoods identified in this Specification shall include the miscellaneous metal panels and other related components as identified on the Drawings and that are necessary for the complete installation. Hoods shall function as ventilated, enclosed work spaces, designed to capture, confine and exhaust fumes, vapours and particulate matter produced or generated within the enclosure.

1.1 SECTION INCLUDES

A. Laboratory Fume Hoods

1.2 RELATED SECTIONS

A. Division 09 Section 65 13, “Resilient Base and Accessories”

B. Division 12 Section 36 00, “Countertops”

C. Division 12 Section 35 53, “Manufactured Metal Casework

D. Division 12 Section 32 00, “Manufactured Wood Casework”

E. Division 13 Section 21 00, “Controlled Environment Rooms”

F. Division 22 Section 40 00, “Plumbing Fixtures”

G. Division 23 Section 30 00, “HVAC Air Distribution”

H. Division 26 Section 05 00, “Common Work Results for Electrical”

I. Related Work To Be Performed By Others:

1. Final installation of all plumbing, service and electrical fixtures attached to fume hood or countertop

(excluding piping and wiring within fume hoods).

2. Final connection to service lines of all plumbing, service and electrical fixtures attached to laboratory

casework or fume hoods.

1.3 REFERENCES

A. SEFA 1-2006: Laboratory Fume Hoods – Design, Materials, Use and Testing Guidelines

Science Equipment and Furniture Association (SEFA)

B. ISO 9001:2008 – Quality Management

International Standards Organization (ISO)

C. ADA (ATBCB ADAAG) Americans with Disabilities Act Accessibility Guidelines

Americans with Disabilities Act (ADA)

1.4 SUBMITTALS

Refer to Section 01 33 00, “Submittal Procedures,” for requirements, procedures, etc.

A. Product Data:

1. Drawings shall include data and details for construction of the laboratory fume hoods as well as information regarding the name, quantity, type and construction of materials (such as hardware, gauges, etc), that will be used to complete the project.

B. Shop Drawings:

1. The laboratory casework manufacturer shall furnish shop drawings illustrating the layout and placement

of all laboratory casework and fume hoods as well as any products included in this section.

2. Indicate the type and location of all service fittings and associated supply connections.

3. Preparation instructions and recommendations.

4. Storage and handling requirements and recommendations.

5. Installation methods.

C. Selection Samples:

Submit the following:

1. One complete set of color chips representing the manufacturer’s full range of available colors.

Minimum sample size 2 inches by 3 inches (50mm x 76mm).

D. Quality Assurance/Control

1. Design Data/Test Reports: Manufacturer shall submit test data and design criteria which are in compliance with the project specifications.

2. Performance: Fume Hoods, Sigma Systems “SafeGuard style” model, shall be designed to meet or exceed the American Standard for Laboratory Ventilation and the American Industrial Hygiene Association standard as described in ANSI/AIHA Z9.5. This standard of performance shall be verified through factory testing in accordance with the established protocol as set out by the ANSI/ASHRAE 110 standard.

3. Certificates: All certifications required in the specifications shall be submitted with the original submittal

package under separate cover. Certificates must be provided with the signature of a qualified individual of the supplier.

4. Manufacturers’ Instructions: Provide manufacturer’s instructions for installation and maintenance of all

products provided and installed within this section. Instructions will be in bound form, tabbed and organized by section number.

5. Submit copy of the corrosion resistant label to be attached to the fume hood exterior with condensed information covering recommended locations for apparatus and accessories.

1.5 QUALITY ASSURANCE

A. Manufacturer Qualifications:

1. The following list of information will be provide to the Architect at least ten (10) days prior to the bid opening:

2. List of manufacturing facilities;

3. Manufacturer of fume hoods shall have the capability within their facility of performing fume hood tests based on the latest ANSI/ASHRAE Specification 110.

4. A list of ten (10) installations of comparable stature completed within the past 5 years;

5. Construction details depicting the materials, sizes and methods of construction;

B. Mock-Ups

1. Area mockups shall be as indicated on the shop drawings. Post bid mockup areas must be priced for disassembly and reassembly and used within the project.

2. Do not proceed with remaining work until installation is approved by Architect.

a) Install base cabinet with specified hardware.

b) Install fume hood with specified fixtures.

1.6 DELIVERY, STORAGE AND HANDLING

A. Packaging, Shipping, Handling and Unloading

1. Packaging: Products shall have packaging adequate enough to protect finished surfaces from soiling or damage during shipping, delivery and installation.

2. Delivery: Fume hood delivery shall only take place after painting, utility rough-ins and related activities are completed that could otherwise damage, soil or deteriorate fume hoods in installation areas.

3. Handling: Care, such as the use of proper moving equipment, experienced movers, etc., shall be used at all times to avoid damaging the fume hoods. Until installation takes place, any wrapping, insulation or other method of protection applied to products from the factory will be left in place to avoid accidental damage.

B. Acceptance at Site:

1. Fume hoods will not be delivered or installed until the conditions specified under Part 3, Installation section of this document have been met.

C. Storage:

1. Fume hoods shall be stored in the area of installation. If, prior to installation, it is necessary for the fume hoods to be temporarily stored in an area other than the installation area, the environmental conditions shall meet the environmental requirements specified under the Project Site Conditions article of this section.

D. Waste Management and Disposal:

1. The supplier of the laboratory fume hoods are responsible for removing any waste or refuse resulting from the installation of, or work pertaining to laboratory fume hoods; thereby leaving the project site clean and free of debris. Trash container(s) to be provided by others.

1.7 PROJECT SITE CONDITIONS

A. Building must be enclosed (windows and doors sealed and weather-tight);

B. An operational HVAC system that maintains temperature and humidity at occupancy levels must be in place;

C. Adjacent and related work shall be complete;

D. Ceiling, overhead ductwork and lighting must be installed;

E. Site must be free of any further construction such as “wet work”;

F. Required casework must be installed accurately and the project must be ready for fume hood installation.

1.8 WARRANTY

A. Furnish a written warranty that Work performed under this Section shall remain free from defects as to materials and workmanship for a period of two (2) years from date of shipment. Defects in materials and workmanship that may develop within this time are to be replaced without cost or expense to the Owner.

Defects include, but are not limited to:

1. Ruptured, cracked, or stained coating

2. Discoloration or lack of finish integrity

3. Cracking or peeling of finish

4. Slippage, shift, or failure of attachment to wall, floor, or ceiling

5. Weld or structural failure

6. Warping or unloaded deflection of components

7. Failure of hardware

B. The warranty with respect to products of another manufacturer sold by Mott Manufacturing is limited to the warranty extended by that manufacturer to Mott Manufacturing.

PART 2 – PRODUCTS

2.1 MANUFACTURER

A. Acceptable Manufacturer:

Mott Manufacturing Ltd.; 452 Hardy Rd. Brantford, ON, Canada N3T 5L8. Tel: (519) 752-7825. Fax:

(519) 752-2895. Email: inquire@mott.ca, www.mott.ca.

B. Substitutions:

Must meet design intent and all specification requirements and have prior approval.

C. Requests for substitutions:

All requests will be considered in accordance with provisions of Section 01 60 00.

2.2 FUME HOOD MATERIALS

A. Basic Materials

NOTE: A complete list of basic materials is provided here. Not all models use all materials listed.

1. Exterior Panels Framing Members, and Furring Panels: Cold rolled and levelled mild steel and shall conform to ASTM A1008/A1008M, finished as in Para. 2.4.

2. Screws: Interior fastening devices; stainless steel screws complete with corrosion resistant plastic caps.

3. By-Pass: 18 Ga (1.2mm) thick mild steel down draft curved, finished same as exterior panels.

4. Lower Foil: For hoods, form using 14 Ga (1.9mm) Type 316-4 stainless steel.

5. Safety Glass: Laminated type 6mm (1/4”) thick as per Section 11 53 00.

6. Sash guides: Track shall be corrosion resistant polyvinyl chloride (PVC).

7. Sash Chain: #35 hardened

8. Sprocket system for Sash Chain: Hardened sprockets with one full width shaft per sash running in ball bearings.

9. Baffle support brackets: Fiberglass reinforced polyester thermoset resin of 3/16” (5mm) thickness.

10. Baffle support brackets: Same material as hood lining.

11. Duct Stubs: bell shaped Type 316, 18 Ga (1.2mm) stainless steel.

12. Light Switches: Light switches shall be black in color, commercial spec grade or higher and shall be UL and CSA approved.

13. Electrical receptacles: Electrical receptacles shall be black in color, commercial spec grade or higher and shall be UL and CSA approved.

14. Cover Plates: Electrical cover plates shall be black in color, nylon and UL and CSA approved.

15. Fluorescent Fixture: Fixture shall be two tube rapid start or better. Energy saving cool white T8 lamps shall be provided. Ballast shall be sound rated to limit noise.

B. Fume Hood Liner

1. FRP: Hood linings and baffles shall be fiberglass reinforced polyester thermoset resin of 3/16” (5mm)

thickness. The fiberglass reinforced polyester panel shall have a minimum flexural strength of 15,000

psi (103,400 kPa), with a flame spread of 25 or less as per ASTM #E84. Final appearance shall be

smooth and white in colour.

C. Fume Hood Furring Panels

1. Where called for, provide matching furring panels to enclose the space between top edge of fume

hoods and the finished ceiling.

2. Panels shall be flanged, notched and reinforced where required to form a well-fitted enclosure, free

from oil-canning. Secure panels using cadmium-plated, self-tapping screws; panels shall be removable for maintenance purposes.

3. Finish shall match fume hood to which it is connected.

2.3 FUME HOOD CONSTRUCTION

A. Fume hood superstructure shall be double wall construction consisting of an outer shell of sheet steel and an inner hood liner. Double wall shall house and conceal steel framing members, attaching brackets and remote operating service fixture mechanisms. Overall double wall thickness; 4-3/4” maximum.

B. Front double-wall posts shall be pre-punched to accept up to 4 plumbing fittings per side, two electrical duplex outlets, light switch and optional monitor alarm where indicated on drawings. Electrical outlets and light switch shall be factory-wired and terminate at a junction box on roof of hood. All electrical components shall be UL listed/classified.

C. Exterior panel members shall be fastened by means of concealed devices. Exposed screws are not acceptable.

D. Provide access to remote-controlled fixture valves concealed between walls through removable panels on hood exterior and access panels on both inside liner walls. Assemble hood superstructure, fasten and connect inner and outer frame into a rigid self supporting entity.

E. Install fluorescent lighting fixture on exterior of roof. Provide a 6 mm safety glass panel on hood "roof", sealed to isolate the lighting fixture from fume chamber. The 2-lamp fixture in each hood shall be largest possible for fume hood size, and shall be rapid start type, UL listed/classified. Provide lamps to fixtures. Average interior illumination levels within the fume chamber shall be 80 foot candles minimum. Ballast shall be sound rated to limit noise level. Finish fixture interior with white baked enamel.

F. Work areas shall be defined as that area inside the superstructure from side to side and from face of baffle to the inside face of sash and from the work surface to a height of 28”. Floor mounted hoods shall have a work area with a height of 65”.

G. Fume hood sash(s) shall be full view type providing a clear and unobstructed side to side view of fume hood interior. Sash shall be laminated safety glass set into extruded polyvinyl chloride guide. Bottom and side sash rails shall be 18 Ga stainless steel. Glass shall be set into rails with PVC glazing channel. Bottom rail shall be an integral, formed, full width, flush pull and shall be anchored on each side to sash chains at bottom. A single weight, sprocket and chain counter balance system shall be used for vertical operation of sash and prevent jamming to permit one finger operation at any point along full width sash pull and to maintain sash at any position below working height without creep. Sash system shall be designed to prevent sash drop in the event of chain failure. Superstructure shall have a single sash and counter balance system. Sash shall open and close against rubber bumper stops. Floor mounted hoods shall be equipped with two vertically rising sashes in two tracks. Normal operation shall be with only one sash open. Both sashes shall be opened for set-up and teardown only. Bench model hoods shall be equipped with a sash lowering device designed to lower the sash when released to below the safe working height as specified by customer (18 inches recommended). Sash shall operate normally below that height.

H. Hood shall be constant volume type with a built in automatic compensating by-pass to maintain constant exhaust volume regardless of sash position. By-pass shall be positive in action, and controlled by upper plenum in the area immediately above the top portion of the sash when closed. Upper bypass plenum shall provide a downwardly vectored bypass. As the sash is lowered, the by-pass design limits the increase in face velocity to a maximum of 4-1/2 times average face velocity as measured with the sash fully open.

I. Perimeter of sash opening shall have a lower flush sill and streamlined shape side and top with angled opening toward hood interior. Air shall enter through the flush sill when the sash is in the closed position. Bottom sill shall hinge open to allow cleaning of the integral spill containment trough. Sash shall close on sill. Floor mounted hoods shall not be equipped with a lower sill. A one inch gap shall be provided to prevent vapor build-up behind closed lower sash.

J. Three-piece main baffles shall provide controlled air vectors into and through the fume hood and be fabricated of the same material as the liner. Provide exhaust slots on the full perimeter of baffles. A fixed, permanently-open, horizontal slot located at 31-1/2” above the work surface shall be provided at the overlapping mid-point of the main baffles. Floor mounted hoods shall be equipped with a three piece baffle system.

K. For safety, fume hood shall maintain essentially constant exhaust volume at any baffle position. Changes in average face velocity and exhaust volume as a result of baffle adjustment shall not exceed 5% for any baffle position at the specified face velocity.

L. Design fume hoods to minimize static pressure loss with adequate slot area around the baffle and the bell shaped exhaust collar configuration. Measured average static pressure loss reading taken three diameters above the hood outlet from four points, 90o apart, shall not exceed the following values based on 60” wide hood:

Face Velocity Measured Static Pressure Loss

75 F.P.M. (0.38 m/s) 0.15” (45.8 Pa)

100 F.P.M. (0.51 m/s) 0.20” (87.1 Pa)

125 F.P.M. (0.64 m/s) 0.25” (136.9 Pa)

M. Electrical convenience duplex outlets shown mounted on the face of fume hoods shall be installed in front posts and pre-wired to a junction box mounted on top of fume hood superstructure. Electrical devices shall be UL classified/listed.

N. Attach corrosion resistant labels to units as specified in Para. 1.4.D.4

2.4 FUME HOOD EXTERIOR FINISH

A. Coating Performance data is available in Appendix 1

2.5 AIR FLOW MONITOR / ALARM

A. TEL AFA 1001 Mk3 digital airflow alarm or equivalent shall be provided.

PART 3 – EXECUTION

3.1 INSTALLATION

A. In addition to requirements of Section 11 53 13, install fume hoods in positions shown, align and set level with levelling devices.

B. Work in close cooperation with allied trades installing ductwork, wiring and other services.

C. Turn over to Mechanical Trades, service fitting remote control rods and valves for installation to fume hood superstructure and service lines.

MOTT/SIGMA SPEC REV-0 07/14 11 53 13-1 

 SECTION 11 53 13 

(FORMERLY 11610) 

OBSERVATION2 STYLE GLASS WALLED FUME HOODS 

Display hidden notes to specifier by using "Tools/Options/View/Hidden Text” 

PART 1 – GENERAL 

Summary: 

This Specification identifies the minimum material and construction standards that are required to deliver a quality installation of laboratory fume hoods. Fume hoods shall be supplied in accordance with the requirements of this Specification. The fume hoods identified in this Specification shall include the miscellaneous metal panels and other related components as identified on the Drawings and that are necessary for the complete installation. 

Hoods shall function as ventilated, enclosed work spaces, designed to capture, confine and exhaust fumes, vapours and particulate matter produced or generated within the enclosure. Observation2 fume hoods are not suited to highly corrosive situations. 

1.1 SECTION INCLUDES 

A. Laboratory Fume Hoods 

1.2 RELATED SECTIONS 

A. Division 09 Section 65 13, “Resilient Base and Accessories” 

B. Division 12 Section 36 00, “Countertops” 

C. Division 12 Section 35 53, “Manufactured Metal Casework 

D. Division 12 Section 32 00, “Manufactured Wood Casework” 

E. Division 13 Section 21 00, “Controlled Environment Rooms” 

F. Division 22 Section 40 00, “Plumbing Fixtures” 

G. Division 23 Section 30 00, “HVAC Air Distribution” 

H. Division 26 Section 05 00, “Common Work Results for Electrical” 

I. Related Work To Be Performed By Others:

1. Final installation of all plumbing, service and electrical fixtures attached to fume hood or countertop (excluding piping and wiring within fume hoods). 

2. Final connection to service lines of all plumbing, service and electrical fixtures attached to laboratory casework or fume hoods.

1.3 REFERENCES 

A. SEFA 1-2010: Laboratory Fume Hoods – Design, Materials, Use and Testing Guidelines 

Science Equipment and Furniture Association (SEFA) 

B. ISO 9001:2008 – Quality Management 

International Standards Organization (ISO) 

C. ADA (ATBCB ADAAG) Americans with Disabilities Act Accessibility Guidelines Americans with Disabilities Act (ADA) 

D. ANSI/ASHRAE: (American National Standards Institute - American Society of Heating, Refrigerating and Air Conditioning Engineers) 

E. UL 1805: Underwriters Laboratories requirements for ducted fume hoods 

1.4 SUBMITTALS 

Refer to Section 01 33 00, “Submittal Procedures,” for requirements, procedures, etc. 

A. Product Data: 1. Drawings shall include data and details for construction of the laboratory fume hoods as well as information regarding the name, quantity, type and construction of materials (such as hardware, gauges, etc), that will be used to complete the project. 

B. Shop Drawings:

1. The laboratory casework manufacturer shall furnish shop drawings illustrating the layout and placement of all laboratory casework and fume hoods as well as any products included in this section. 

2. Indicate the type and location of all service fittings and associated supply connections. 

3. Preparation instructions and recommendations. 

4. Storage and handling requirements and recommendations. 

5. Installation methods. 

C. Selection Samples: 1. One complete set of color chips representing the manufacturer’s full range of available colors. Minimum sample size 2 inches by 2-1/2 inches (50mm x 64mm). 

D. Quality Assurance/Control 

1. Design Data/Test Reports: Manufacturer shall submit test data and design criteria which are in compliance with the project specifications. 

2. Performance: Fume Hoods, Sigma Systems “Observation2” model, shall be designed to meet or exceed the American Standard for Laboratory Ventilation and the American Industrial Hygiene Association standard as described in ANSI/AIHA Z9.5. This standard of performance shall be verified through factory testing in accordance with the established protocol as set out by the ANSI/ASHRAE 110 standard. 

3. UL 1805 listed for fume hood requirements as specified and tested. 

4. Certificates: All certifications required in the specifications shall be submitted with the original submittal package under separate cover. Certificates must be provided with the signature of a qualified individual of the supplier. 

5. Manufacturers’ Instructions: Provide manufacturer’s instructions for installation and maintenance of all products provided and installed within this section. 

6. Submit copy of the corrosion resistant label to be attached to the fume hood exterior with condensed information covering recommended locations for apparatus and accessories. 

1.5 QUALITY ASSURANCE 

A. Manufacturer Qualifications:

1. The following list of information will be provide to the Architect at least ten (10) days prior to the bid opening: 

2. List of manufacturing facilities 

3. Manufacturer of fume hoods shall have the capability within their facility of performing fume hood tests based on the latest ANSI/ASHRAE Specification 110. 

4. A list of ten (5) installations of comparable stature completed within the past 5 years 

5. Construction details depicting the materials, sizes and methods of construction 

B. Mock-Ups 

1. Area mockups shall be as indicated on the shop drawings. Post bid mockup areas must be priced for disassembly and reassembly and used within the project. 

2. Do not proceed with remaining work until installation is approved by Architect.

a) Install base cabinet with specified hardware. 

b) Install fume hood with specified fixtures. 

1.6 DELIVERY, STORAGE AND HANDLING 

A. Packaging, Shipping, Handling and Unloading 

1. Packaging: Products shall have packaging adequate enough to protect finished surfaces from soiling or damage during shipping, delivery and installation. 

2. Delivery: Fume hood delivery shall only take place after painting, utility rough-ins and related activities are completed that could otherwise damage, soil or deteriorate fume hoods in installation areas.

3. Handling: Care, such as the use of proper moving equipment, experienced movers, etc., shall be used at all times to avoid damaging the fume hoods. Until installation takes place, any wrapping, insulation or other method of protection applied to products from the factory will be left in place to avoid accidental damage. 

B. Acceptance at Site: 

1. Fume hoods will not be delivered or installed until the conditions specified under Part 3, Installation section of this document have been met. 

C. Storage: 

1. Fume hoods shall be stored in the area of installation. If, prior to installation, it is necessary for the fume hoods to be temporarily stored in an area other than the installation area, the environmental conditions shall meet the environmental requirements specified under the Project Site Conditions article of this section. 

D. Waste Management and Disposal: 

1. The supplier of the laboratory fume hoods are responsible for removing any waste or refuse resulting from the installation of, or work pertaining to laboratory fume hoods; thereby leaving the project site clean and free of debris. Trash container(s) to be provided by others. 

1.7 PROJECT SITE CONDITIONS 

A. Building must be enclosed (windows and doors sealed and weather-tight). 

B. An operational HVAC system that maintains temperature and humidity at occupancy levels must be in place. 

C. Adjacent and related work shall be complete. 

D. Ceiling, overhead ductwork and lighting must be installed. 

E. Site must be free of any further construction such as “wet work”. 

F. Required casework must be installed accurately and the project must be ready for fume hood installation. 

1.8 WARRANTY 

A. Furnish a written warranty that Work performed under this Section shall remain free from defects as to materials and workmanship for a period of two (2) years from date of shipment. Defects in materials and workmanship that may develop within this time are to be replaced. 

Defects include, but are not limited to: 

1. Ruptured, cracked, or stained coating 

2. Discoloration or lack of finish integrity 

3. Cracking or peeling of finish

4. Slippage, shift, or failure of attachment to wall, floor, or ceiling 

5. Weld or structural failure 

6. Warping or unloaded deflection of components 

7. Failure of hardware 

B. The warranty with respect to products of another manufacturer sold by Mott Manufacturing is limited to the warranty extended by that manufacturer to Mott Manufacturing. 

PART 2 – PRODUCTS 

2.1 MANUFACTURER 

A. Acceptable Manufacturer: 

Mott Manufacturing Ltd.; 452 Hardy Rd. Brantford, ON, Canada N3T 5L8. Tel: (519) 752-7825 Fax: (519) 752-2895. Email: inquire@mott.ca, www.mott.ca. 

Basis of Design: Mott Manufacturing Observation2 Fume Hood 

B. Substitutions: 

Must meet all specification requirements and have prior approval. 

C. Requests for substitutions: 

All requests will be considered in accordance with provisions of Section 01 60 00. 

2.2 FUME HOOD MATERIALS 

A. Basic Materials NOTE: A complete list of basic materials is provided here. Not all models use all materials listed. 

1. Exterior Panels Framing Members, and Furring Panels: Cold rolled and leveled mild steel and shall conform to ASTM A1008/A1008M, finished as in Para. 2.4. 

2. Screws: Interior fastening devices; stainless steel screws. 

3. By-Pass: 18 Ga (1.2mm) thick mild steel downward directional, finished same as exterior panels. 

4. Upper front panel: to be 20 Ga (0.9mm) thick mild steel powder coated that is removed without the use of tools and doesn’t have any exposed screws. 

5. Lower Foil / Flush Sill: Type 316-4 stainless steel powder coated. 

6. Safety Glass: All glass panels shall be laminated type .” (6mm) thick. 

7. Sash guides: Track shall be corrosion resistant polyvinyl chloride (PVC). 

8. Sash Chain: #35 hardened.

9. Sash Pull: Type 316, 18 Ga (1.2mm) thick stainless steel with an ANSI #4 satin finish. 

10. Sprocket System For Sash Chain: Sprockets with one full width shaft per sash running in ball bearings. 

11. Baffle/plenum: Interior to chamber shall be 18 Ga. metal per either of the following with no exceptions: 

i. Mild cold rolled steel that has been galvanized or galvannealed and powder coated to match the rest of the fume hood. 

ii. Type 316 stainless steel that is powder coated to match the rest of the hood. 

12. Duct Stubs: Rectangular Type 316, 18 Ga (1.2mm) stainless steel. 

13. Light Switch: Light switch shall be combination style with one NEMA 5-20R receptacle, white in color, commercial spec grade or higher and shall be UL and CSA approved and shall located in the left side post. 

14. Electrical receptacles: Electrical receptacles shall be white combination style with two NEMA 5-20R receptacles and two USB charging receptacles in each, and be UL and CSA approved and shall be located in the bottom of the right side post. 

15. Fluorescent Light: Fixture shall be two tube rapid start or better. Energy saving cool white T8 lamps shall be provided. Ballast shall be sound rated to limit noise. 

B. Fume Hood Interior 

1. Interior shall be powder coated 18 Ga. galvanized or galvannealed mild cold rolled steel to 

match the rest of the fume hood. Optional 316 stainless steel liner is also available. 

C. Fume Hood Furring Panels 

1. Where called for, provide matching furring panels to enclose the space between top edge of fume hoods and the finished ceiling. 

2. Panels shall be flanged, notched and reinforced where required to form a well-fitted enclosure, free from oil canning. Panels shall be held in place with hidden snap clips and shall be easily removable for maintenance purposes. Exposed screw heads are not acceptable. 

3. Finish shall match fume hood to which it is connected. 

2.3 FUME HOOD CONSTRUCTION 

A. Units may be double or single chamber. Single-face fume hoods shall have a sloped sash (optional combination sash). Double-face fume hoods shall have both sashes sloped (optional combination sashes). Specification applies to both single-faced and a double-faced hood however only reads as single-faced for clarity. 

B. Fume hood superstructure shall be single wall construction consisting of sheet steel and laminated safety glass.

C. Bottom/Side walls shall be designed to accept service outlets. 

D. Interior members shall be fastened by means of exposed and concealed screws. 

E. Exterior members shall be fastened by means that conceal all screws. Exposed screws are not acceptable. Snap-off top panel, and front post covers shall be easily removable with the use of simple hand tools. 

F. Provide access to remote-controlled front load fixture valves through front post and interior removable panel. A maximum of four plumbing fixtures shall fit in each post and shall ship pre-plumbed from the factory using 3/8” OD cross linked polyethylene tubing with the exception of natural gas which shall be stainless steel tubing. Front posts shall be 3” wide and 4-1/2” deep to maximum sash width and side wall window area. Remote-controlled ball type or rod type valves must be mounted below the hood. Ball type or rod type fixtures will not ship pre-plumbed from the factory. 

G. Install fluorescent lighting fixture on exterior of roof. Provide a 6mm (1/4”) safety glass panel on hood "roof", sealed to isolate the lighting fixture from fume chamber. The 2-lamp fixture in each hood shall be largest possible for fume hood size. Average interior illumination levels within the fume chamber at the work surface shall be 80 foot candles minimum. Finish fixture interior with white baked enamel. 

H. Fume hood sash shall be full view type providing a clear and unobstructed side to side view of fume hood interior. Vertical sash shall be laminated safety glass set into extruded polyvinyl chloride guide. Bottom and side sash rails shall be 18 Ga (1.2mm) 316 stainless steel. Glass shall be set into rails with PVC glazing channel. Bottom rail shall be an integral, formed, full width, flush pull and shall be anchored on each side to chains at bottom. A double weight, chain and sprocket, counter balance system shall be used for vertical operation of sash and prevent jamming to permit one finger operation at any point along full width sash pull and to maintain sash at any position without creep. 

I. Optional Combination Sash: Where indicated, fume hood sash shall be a combination Vertical / Horizontal sash. Vertically rising frame shall be of 316 stainless steel construction. Horizontal sliding panels shall be 6mm (1/4”) laminated safety glass. Sides of horizontal panels shall be protected with snap-on plastic edge guard. Horizontal sliding panels shall ride on rollers in an extruded aluminium bottom and top track with positive locking system to prevent inadvertent removal. A double weight, chain and sprocket, counter balance system shall be used for vertical operation of sash and prevent jamming to permit one finger operation at any point along full width sash pull and to maintain sash at any position without creep. Fume hoods shall also be equipped with a fixed panel located nominally 1” (25mm) behind the sash plane, covering the space between the interior roof of the fume hood and the upper edge of the sash frame. 1” (25mm) space shall be left open to provide downwardly vectored by-pass air, thus reducing dead space behind closed sash. 

J. Self-closing sash: A mechanism shall be provided which automatically lowers the sash to the 18” working height . A latch shall be provided to hold the sash fully open for setup/teardown of experiments. Below the chosen working height, the sash shall be balanced and function as a conventional sash. 

K. Hood shall be constant volume type with a built in automatic compensating by-pass to maintain constant exhaust volume regardless of sash position. By-pass shall be positive in action, and controlled by shaped panel in the area immediately above the top portion of the sash when closed. As the sash is lowered, the by-pass design limits the increase in face velocity to a maximum of 4-1/2 times average face velocity as measured with the sash fully open. 

L. Optional Restricted Bypass (VAV use): Duel exhaust collar and single-face models only - Standard front panel shall be supplemented by the addition of a panel behind the by-pass panel area. Panel shall be made of the same material as the hood interior. 

M. Perimeter of sash opening shall have a lower air foil and streamlined shape sides and top with radius openings toward hood interior. 

N. Air shall enter under the bottom flush sill through a nominal 1” (25mm) by-pass when the sash is in the closed position. Bottom foil shall be removable without the use of special tools. Sash shall close on flush sill. 

O. The main plenums shall provide controlled air vectors into and through the fume hood and be fabricated of the same material as hood liner. 

P. Design fume hoods to minimize static pressure loss with adequate slot area around the baffle and the rectangular shaped exhaust collar configuration. Measured average static pressure loss reading taken three diameters above the hood outlet from four points, 90o apart, shall not exceed the following values based on 60” (1524mm) wide hood: Face Velocity Measured Static Pressure Loss 100 F.P.M. (0.51 m/s) 0.45 60 F.P.M. (0.30 m/s) 0.35 

Q. Airflow Requirements: Observation2 fume hood is designed to function with the following exhaust volumes. Double-faced units would exhaust double the volumes noted below. 

• Single-Faced Exhaust Parameters 
• 100 FPM 
• 60 FPM 
• 100 FPM 
• 18"Sash 
• Opening 
• 18" Max Sash Opening 
• Combo Sash Open Horizontally Only 
• Hood Size 
• CFM 
• SP 
• CFM 
• SP 
• CFM 
• SP 
• 48" (1220 mm) 
• 525 
• 0.4 
• 315 
• 0.3 
• 408 
• 0.35 
• 60" (1524 mm) 
• 675 
• 0.45 
• 405 
• 0.35 
• 525 
• 0.4 
• 72" (1829 mm) 
• 825 
• 0.5 
• 495 
• 0.4 
• 642 
• 0.45 

MOTT/SIGMA SPEC REV-4 12/05 11 53 13-1

SECTION 11 53 13

(FORMERLY 11610)

LABORATORY FUME HOODS

PART 1 – GENERAL

Summary:

This Specification identifies the minimum material and construction standards that are required to

deliver a quality installation of laboratory fume hoods. Fume hoods shall be supplied in accordance with the

requirements of this Specification. The fume hoods identified in this Specification shall include the

miscellaneous metal panels and other related components as identified on the Drawings and that are

necessary for the complete installation.

Hoods shall function as ventilated, enclosed work spaces, designed to capture, confine and

exhaust fumes, vapours and particulate matter produced or generated within the enclosure.

1.1 SECTION INCLUDES

A. Laboratory Fume Hoods

1.2 RELATED SECTIONS

A. Division 09 Section 65 13, “Resilient Base and Accessories”

B. Division 12 Section 36 00, “Countertops”

C. Division 12 Section 35 53, “Manufactured Metal Casework

D. Division 12 Section 32 00, “Manufactured Wood Casework”

E. Division 13 Section 21 00, “Controlled Environment Rooms”

F. Division 22 Section 40 00, “Plumbing Fixtures”

G. Division 23 Section 30 00, “HVAC Air Distribution”

H. Division 26 Section 05 00, “Common Work Results for Electrical”

I. Related Work To Be Performed By Others:

1. Final installation of all plumbing, service and electrical fixtures attached to fume hood or

countertop (excluding piping and wiring within fume hoods).

2. Final connection to service lines of all plumbing, service and electrical fixtures attached to

laboratory casework or fume hoods.

1.3 REFERENCES

A. SEFA 1-2002: Laboratory Fume Hoods – Design, Materials, Use and Testing Guidelines

Science Equipment and Furniture Association (SEFA)

B. ISO 9001:2008 – Quality Management

International Standards Organization (ISO)

C. ADA (ATBCB ADAAG) Americans with Disabilities Act Accessibility Guidelines

Americans with Disabilities Act (ADA)

1.4 SUBMITTALS

Refer to Section 01 33 00, “Submittal Procedures,” for requirements, procedures, etc.

A. Product Data:

1. Drawings shall include data and details for construction of the laboratory fume hoods as well

as information regarding the name, quantity, type and construction of materials (such as

hardware, gauges, etc), that will be used to complete the project.

B. Shop Drawings:

1. The laboratory casework manufacturer shall furnish shop drawings illustrating the layout and

placement of all laboratory casework and fume hoods as well as any products included in this

section.

2. Indicate the type and location of all service fittings and associated supply connections.

3. Preparation instructions and recommendations.

4. Storage and handling requirements and recommendations.

5. Installation methods.

C. Selection Samples:

Submit the following:

1. One complete set of color chips representing the manufacturer’s full range of available colors.

Minimum sample size 2 inches by 3 inches (50mm x 76mm).

D. Quality Assurance/Control

1. Design Data/Test Reports: Manufacturer shall submit test data and design criteria which are

in compliance with the project specifications.

2. Performance: Fume Hoods, Sigma Systems “Pro” model, shall be designed to meet or exceed

the American Standard for Laboratory Ventilation and the American Industrial Hygiene

Association standard as described in ANSI/AIHA Z9.5. This standard of performance shall be

verified through factory testing in accordance with the established protocol as set out by the

ANSI/ASHRAE 110 standard.

3. Certificates: All certifications required in the specifications shall be submitted with the original

submittal package under separate cover. Certificates must be provided with the signature of a

qualified individual of the supplier.

4. Manufacturers’ Instructions: Provide manufacturer’s instructions for installation and

maintenance of all products provided and installed within this section. Instructions will be in

bound form, tabbed and organized by section number.

5. Submit copy of the corrosion resistant label to be attached to the fume hood exterior with

condensed information covering recommended locations for apparatus and accessories.

1.5 QUALITY ASSURANCE

A. Manufacturer Qualifications:

1. The following list of information will be provide to the Architect at least ten (10) days prior to

the bid opening:

2. List of manufacturing facilities;

3. Manufacturer of fume hoods shall have the capability within their facility of performing fume

hood tests based on the latest ANSI/ASHRAE Specification 110.

4. A list of ten (10) installations of comparable stature completed within the past 5 years;

5. Construction details depicting the materials, sizes and methods of construction;

B. Mock-Ups

1. Area mockups shall be as indicated on the shop drawings. Post bid mockup areas must be

priced for disassembly and reassembly and used within the project.

2. Do not proceed with remaining work until installation is approved by Architect.

a) Install base cabinet with specified hardware.

b) Install fume hood with specified fixtures.

1.6 DELIVERY, STORAGE AND HANDLING

A. Packaging, Shipping, Handling and Unloading

1. Packaging: Products shall have packaging adequate enough to protect finished surfaces from

soiling or damage during shipping, delivery and installation.

2. Delivery: Fume hood delivery shall only take place after painting, utility rough-ins and related

activities are completed that could otherwise damage, soil or deteriorate fume hoods in

installation areas.

3. Handling: Care, such as the use of proper moving equipment, experienced movers, etc., shall

be used at all times to avoid damaging the fume hoods. Until installation takes place, any

wrapping, insulation or other method of protection applied to products from the factory will be

left in place to avoid accidental damage.

B. Acceptance at Site:

1. Fume hoods will not be delivered or installed until the conditions specified under Part 3,

Installation section of this document have been met.

C. Storage:

1. Fume hoods shall be stored in the area of installation. If, prior to installation, it is necessary for

the fume hoods to be temporarily stored in an area other than the installation area, the

environmental conditions shall meet the environmental requirements specified under the

Project Site Conditions article of this section.

D. Waste Management and Disposal:

1. The supplier of the laboratory fume hoods are responsible for removing any waste or refuse

resulting from the installation of, or work pertaining to laboratory fume hoods; thereby leaving

the project site clean and free of debris. Trash container(s) to be provided by others.

1.7 PROJECT SITE CONDITIONS

A. Building must be enclosed (windows and doors sealed and weather-tight);

B. An operational HVAC system that maintains temperature and humidity at occupancy levels must

be in place;

C. Adjacent and related work shall be complete;

D. Ceiling, overhead ductwork and lighting must be installed;

E. Site must be free of any further construction such as “wet work”;

F. Required casework must be installed accurately and the project must be ready for fume hood

installation.

1.8 WARRANTY

A. Furnish a written warranty that Work performed under this Section shall remain free from defects

as to materials and workmanship for a period of two (2) years from date of shipment. Defects in

materials and workmanship that may develop within this time are to be replaced without cost or

expense to the Owner.

Defects include, but are not limited to:

1. Ruptured, cracked, or stained coating

2. Discoloration or lack of finish integrity

3. Cracking or peeling of finish

4. Slippage, shift, or failure of attachment to wall, floor, or ceiling

5. Weld or structural failure

6. Warping or unloaded deflection of components

7. Failure of hardware

B. The warranty with respect to products of another manufacturer sold by Mott Manufacturing is

limited to the warranty extended by that manufacturer to Mott Manufacturing.

PART 2 – PRODUCTS

2.1 MANUFACTURER

A. Acceptable Manufacturer:

Mott Manufacturing Ltd.; 452 Hardy Rd. Brantford, ON, Canada N3T 5L8. Tel: (519) 752-7825.

Fax: (519) 752-2895. Email: inquire@mott.ca, www.mott.ca.

B. Substitutions:

Must meet all specification requirements and have prior approval.

C. Requests for substitutions:

All requests will be considered in accordance with provisions of Section 01 60 00.

2.2 FUME HOOD MATERIALS

A. Basic Materials

NOTE: A complete list of basic materials is provided here. Not all models use all materials listed.

1. Exterior Panels Framing Members, and Furring Panels: Cold rolled and levelled mild steel and

shall conform to ASTM A1008/A1008M, finished as in Para. 2.4.

2. Screws: Interior fastening devices; stainless steel screws complete with corrosion resistant

plastic caps.

3. By-Pass Grilles: 18 Ga (1.2mm) thick mild steel directionally louvered upward, finished same

as exterior panels.

4. Lower Foil: For hoods, form using 14 Ga (1.9mm) Type 316-4 stainless steel.

5. Safety Glass: Laminated type 6mm (1/4”) thick as per Section 11 53 00.

6. Sash guides: Track shall be corrosion resistant polyvinyl chloride (PVC).

7. Sash Cable: 3/32” (2mm) stranded stainless steel 7 x 19 construction.

8. Sash Chain: #35 hardened

9. Sprocket system for Sash Chain: Hardened sprockets with one full width shaft per sash

running in ball bearings.

10. Sash Pull: Type 316, 18 Ga (1.2mm) thick stainless steel with an AISI #4 satin finish.

11. Pulley Assembly For Sash Cable: 1-1/2” (38mm) diameter nylon rim, ball bearing roller, with

cable retaining device. Provide interior access panels on both sides, and secure using special

moulded white vinyl gasket designed to be removed and reinstalled without use of special

tools.

12. Baffle support brackets: Same material as hood lining.

13. Duct Stubs: Bell shaped Type 316, 18 Ga (1.2mm) stainless steel.

14. Light Switches: Light switches shall be black in color, commercial spec grade or higher and

shall be UL and CSA approved.

15. Electrical receptacles: Electrical receptacles shall be black in color, commercial spec grade or

higher and shall be UL and CSA approved.

16. Cover Plates: Electrical cover plates shall be black in color, nylon and UL and CSA approved.

17. Flourescent Fixture: Fixture shall be two tube rapid start or better. Energy saving cool white

T8 lamps shall be provided. Ballast shall be sound rated to limit noise.

B. Fume Hood Liner

1. Perchloric Acid type: Hood linings and baffles shall be Poly Vinyl Chloride of .” (6mm)

thickness with radiused corners. Final appearance shall be smooth and white in colour.

2. Perchloric Stainless steel (optional):

a) 18 ga (1.2mm) 316 stainless steel with a number 4 finish. Inside corners shall

be coved with a nominal 3/4” (19mm) radius. All joints in liner shall be butt

welded using the TIG process. Welds shall be blended and polished to match

the finish of adjacent material. Baffles and wash down trough shall be of the

same material. Hood work surface and trough shall be an integral part of the

hood lining.

C. Fume Hood Furring Panels

1. Where called for, provide matching furring panels to enclose the space between top edge of

fume hoods and the finished ceiling.

2. Panels shall be flanged, notched and reinforced where required to form a well-fitted enclosure,

free from oilcanning. Secure panels using cadmium-plated, self-tapping screws; panels shall

be removable for maintenance purposes.

3. Finish shall match fume hood to which it is connected.

2.3 FUME HOOD CONSTRUCTION

A. Fume hood superstructure shall be double wall construction consisting of an outer shell of sheet

steel and an inner hood liner. Double wall shall house and conceal steel framing members,

attaching brackets and remote operating service fixture mechanisms. Overall double wall

thickness; 4-3/4” (121mm) maximum.

B. Front double-wall posts shall be pre-punched to accept up to 5 plumbing fittings per side, two

electrical duplex outlets, light switch and optional monitor alarm where indicated on drawings.

Electrical outlets and light switch shall be factory-wired and terminate at a junction box on roof of

hood. All electrical components shall be UL listed/classified.

C. Exterior panel members shall be fastened by means of concealed devices. Exposed screws are

not acceptable.

D. Provide access to remote-controlled fixture valves concealed between walls through removable

panels on hood exterior. Assemble hood superstructure, fasten and connect inner and outer frame

into a rigid self supporting entity.

E. Install fluorescent lighting fixture on exterior of roof. Provide a 6mm (1/4”) safety glass panel on

hood "roof", sealed to isolate the lighting fixture from fume chamber. The 2-lamp fixture in each

hood shall be largest possible for fume hood size. Average interior illumination levels within the

fume chamber shall be 80 foot candles minimum. Finish fixture interior with white baked enamel.

F. Fume hood sash(s) shall be full view type providing a clear and unobstructed side to side view of

fume hood interior. Sash shall be laminated safety glass set into extruded polyvinyl chloride guide.

Bottom and side sash rails shall be 18 Ga (1.2mm) stainless steel. Glass shall be set into rails with

PVC glazing channel. Bottom rail shall be an integral, formed, full width, flush pull and shall be

anchored on each side to sash cables at bottom. A single weight, pulley, cable, counter balance

system shall be used for vertical operation of sash and prevent jamming to permit one finger

operation at any point along full width sash pull and to maintain sash at any position without creep.

Sash system shall be designed to prevent sash drop in the event of cable failure. Superstructure

shall have a single sash and counter balance system. Sash shall open and close against rubber

bumper stops. Floor mounted hoods shall be equipped with two vertically rising sashes in two

tracks. Normal operation shall be with only one sash open. Both sashes shall be opened for setup

and teardown only.

G. Fume hood sash shall be full view type providing a clear and unobstructed side to side view of

fume hood interior. Sash shall be laminated safety glass set into extruded polyvinyl chloride guide.

Bottom and side sash rails shall be 18 Ga (1.2mm) stainless steel. Glass shall be set into rails with

PVC glazing channel. Bottom rail shall be an integral, formed, full width, flush pull and shall be

anchored on each side to chains at bottom. A single weight, chain, bearing and shaft, counter

balance system shall be used for vertical operation of sash and prevent jamming to permit one

finger operation at any point along full width sash pull. Sash system shall be designed to prevent

sash drop in the event of chain or cable failure. Superstructure shall have a single sash and

counter balance system. Sash shall open and close against rubber bumper stops.

H. Fume hood sash shall be a combination Vertical / Horizontal sash. Vertically rising frame shall be

of stainless steel construction grade 316 or better. Horizontal sliding panels shall be 6mm (1/4”)

laminated safety glass with integral ground-in pulls. Sides of horizontal panels shall be protected

with snap-on plastic edge guard. Horizontal sliding panels shall ride on rollers in an extruded

aluminium bottom and top track with positive locking system to prevent inadvertent removal. Sash

counterbalance mechanism shall be either chain or cable as required in main hood specification.

Fume hoods shall also be equipped with a fixed panel located nominally 1” (25mm) behind the

sash plane, covering the space between the interior roof of the fume hood and the upper edge of

the sash frame. 1” (25mm) space shall be left open to provide downwardly vectored by-pass air,

thus reducing dead space behind closed sash.

I. Hood shall be constant volume type with a built in automatic compensating by-pass to maintain

constant exhaust volume regardless of sash position. By-pass shall be positive in action, and

controlled by louvered panel in the area immediately above the top portion of the sash when

closed. As the sash is lowered, the by-pass design limits the increase in face velocity to a

maximum of 4-1/2 times average face velocity as measured with the sash fully open.

J. Perimeter of sash opening shall have a lower air foil and streamlined shape side and top with

angled opening toward hood interior. Air shall enter under the bottom horizontal foil through a

nominal 1” (25mm) by-pass when the sash is in the closed position. Bottom foil shall be removable

without the use of special tools. Sash shall close on air foil. Floor mounted hoods shall not be

equipped with a lower airfoil. A one inch gap shall be provided to prevent vapour build-up behind

closed lower sash.

K. Three-piece main baffles shall provide controlled air vectors into and through the fume hood and

be fabricated of the same material as the liner. Provide exhaust slots on the full perimeter of

baffles, with top slot adjustable. A fixed, permanently-open, horizontal slot located at 31-1/2”

(800mm) above the work surface shall be provided at the overlapping mid-point of the main baffles

L. For safety, fume hood shall maintain essentially constant exhaust volume at any baffle position.

Changes in average face velocity and exhaust volume as a result of baffle adjustment shall not

exceed 5% for any baffle position at the specified face velocity.

M. Design fume hoods to minimize static pressure loss with adequate slot area around the baffle and

the bell shaped exhaust collar configuration. Measured average static pressure loss reading taken

three diameters above the hood outlet from four points, 90o apart, shall not exceed the following

values based on 60” (1524mm) wide hood:

Face Velocity Measured Static Pressure Loss

75 F.P.M. (0.38 m/s) 0.15” (45.8 Pa)

100 F.P.M. (0.51 m/s) 0.20” (87.1 Pa)

125 F.P.M. (0.64 m/s) 0.25” (136.9 Pa)

N. Hood shall be designed and constructed to provide a water wash down system. Integral work

surface shall have a raised edge at the front and a full width trough with drain connection at the

rear. Wash down pipe shall be located behind the upper baffle with a minimum of 3 and a

maximum of 5 spray nozzles dependant upon hood width. Spray nozzles shall be directed upward.

System shall include a control valve and associated internal piping.

O. Electrical convenience duplex outlets shown mounted on the face of fume hoods shall be installed

in front posts and pre-wired to a junction box mounted on top of fume hood superstructure.

Electrical devices shall be UL classified/listed.

P. Bottom slot covered with stainless steel screen. Screen to be mounted horizontally behind baffle as

low as possible. Screen to be 3/4” (19mm) x 3/4” (19mm) 18 ga pattern.

Q. The minimum sash height shall be 36” (915mm) with a 6” (152mm) clear static panel mounted at

the top of the sash.

R. Attach corrosion resistant labels to units as specified in Para. 1.4.D.4

2.4 FUME HOOD EXTERIOR FINISH

A. Coating Performance data is available in Appendix 1

2.5 AIR FLOW MONITOR / ALARM

A. TEL AFA 1001 Mk3 digital airflow alarm or equivalent shall be provided.

PART 3 – EXECUTION

3.1 INSTALLATION

A. In addition to requirements of Section 11 53 13, install fume hoods in positions shown, align and

set level with levelling devices.

B. Work in close cooperation with allied trades installing ductwork, wiring and other services.

C. Apply small bead of sealant to junction of fume hood counter top and adjacent hood liner.

D. Turn over to Mechanical Trades, service fitting remote control rods and valves for installation to

fume hood superstructure and service lines.

MOTT OPTIMA FUME HOOD SPEC REV-2 07/2012 11 53 13-1 

SECTION 11 53 13 

OPTIMA LABORATORY FUME HOODS 

PART 1 – GENERAL 

Summary: 

This specification identifies the minimum material and construction standards that are required to deliver a quality installation of laboratory fume hoods. Fume hoods shall be supplied in accordance with the requirements of this specification. The fume hoods identified in this specification shall include the miscellaneous metal panels and other related components as identified on the drawings and that are necessary for the complete installation. Hoods shall function as ventilated, enclosed work spaces, designed to capture, confine and exhaust fumes, vapours and particulate matter produced or generated within the enclosure. 

1.1 SECTION INCLUDES 

A. Laboratory Fume Hoods 

1.2 RELATED SECTIONS 

A. Division 09 Section 65 13, “Resilient Base and Accessories” 

B. Division 12 Section 36 00, “Countertops” 

C. Division 12 Section 35 53, “Manufactured Metal Casework 

D. Division 12 Section 32 00, “Manufactured Wood Casework” 

E. Division 13 Section 21 00, “Controlled Environment Rooms” 

F. Division 22 Section 40 00, “Plumbing Fixtures” 

G. Division 23 Section 30 00, “HVAC Air Distribution” 

H. Division 26 Section 05 00, “Common Work Results for Electrical” 

I. Related Work To Be Performed By Others: 

1. Final installation of all plumbing, service and electrical fixtures attached to fume hood or countertop (excluding piping and wiring within fume hoods). 

2. Final connection to service lines of all plumbing, service and electrical fixtures attached to laboratory casework or fume hoods. 

1.3 REFERENCES 

A. SEFA 1-2006: Laboratory Fume Hoods – Design, Materials, Use and Testing Guidelines 

Science Equipment and Furniture Association (SEFA) 

B. ISO 9001:2008 – Quality Management 

International Standards Organization (ISO) 

C. ADA (ATBCB ADAAG) Americans with Disabilities Act Accessibility Guidelines 

Americans with Disabilities Act (ADA) 

1.4 SUBMITTALS 

Refer to Section 01 33 00, “Submittal Procedures,” for requirements, procedures, etc. 

A. Product Data: 

1. Drawings shall include data and details for construction of the laboratory fume hoods as well as information regarding the name, quantity, type and construction of materials (such as hardware, gauges, etc), that will be used to complete the project. 

B. Shop Drawings: 

1. The laboratory casework manufacturer shall furnish shop drawings illustrating the layout and placement of all laboratory casework and fume hoods as well as any products included in this section. 

2. Indicate the type and location of all service fittings and associated supply connections. 

3. Preparation instructions and recommendations. 

4. Storage and handling requirements and recommendations. 

5. Installation methods. 

C. Selection Samples: 

Submit the following: 

1. One complete set of color chips representing the manufacturer’s full range of available colors. Minimum sample size 2 inches by 3 inches (50mm x 76mm). 

D. Quality Assurance/Control 

1. Design Data/Test Reports: Manufacturer shall submit test data and design criteria which are in compliance with the project specifications. 

2. Performance: Fume Hoods, Sigma Systems Optima model, shall be designed to meet or exceed the American Standard for Laboratory Ventilation and the American Industrial Hygiene Association standard as described in ANSI/AIHA Z9.5. This standard of performance shall be verified through factory testing in accordance with the established protocol as set out by the ANSI/ASHRAE 110 standard. 

3. Certificates: All certifications required in the specifications shall be submitted with the original submittal package under separate cover. Certificates must be provided with the signature of a qualified individual of the supplier. 

4. Manufacturers’ Instructions: Provide manufacturer’s instructions for installation and maintenance of all products provided and installed within this section. Instructions will be in bound form, tabbed and organized by section number. 

5. Submit copy of the corrosion resistant label to be attached to the fume hood exterior with condensed information covering recommended locations for apparatus and accessories. 

1.5 QUALITY ASSURANCE 

A. Manufacturer Qualifications: 

1. The following list of information will be provide to the Architect at least ten (10) days prior to the bid opening: 

2. List of manufacturing facilities; 

3. Manufacturer of fume hoods shall have the capability within their facility of performing fume hood tests based on the latest ANSI/ASHRAE Specification 110.

4. A list of ten (10) installations of comparable stature completed within the past 5 years; 

5. Construction details depicting the materials, sizes and methods of construction; 

B. Mock-Ups 

1. Area mockups shall be as indicated on the shop drawings. Post bid mockup areas must be priced for disassembly and reassembly and used within the project. 

2. Do not proceed with remaining work until installation is approved by Architect. 

a) Install fume hood with specified fixtures. 

1.6 DELIVERY, STORAGE AND HANDLING 

A. Packaging, Shipping, Handling and Unloading 

1. Packaging: Products shall have packaging adequate enough to protect finished surfaces from soiling or damage during shipping, delivery and installation. 

2. Delivery: Fume hood delivery shall only take place after painting, utility rough-ins and related activities are completed that could otherwise damage, soil or deteriorate fume hoods in installation areas. 

3. Handling: Care, such as the use of proper moving equipment, experienced movers, etc., shall be used at all times to avoid damaging the fume hoods. Until installation takes place, any wrapping, insulation or other method of protection applied to products from the factory will be left in place to avoid accidental damage. 

B. Acceptance at Site: 

1. Fume hoods will not be delivered or installed until the conditions specified under Part 3, Installation section of this document have been met. 

C. Storage: 

1. Fume hoods shall be stored in the area of installation. If, prior to installation, it is necessary for the fume hoods to be temporarily stored in an area other than the installation area, the environmental conditions shall meet the environmental requirements specified under the Project Site Conditions article of this section. 

D. Waste Management and Disposal: 

1. The supplier of the laboratory fume hoods are responsible for removing any waste or refuse resulting from the installation of, or work pertaining to laboratory fume hoods; thereby leaving the project site clean and free of debris. Trash container(s) to be provided by others. 

1.7 PROJECT SITE CONDITIONS 

A. Building must be enclosed (windows and doors sealed and weather-tight); 

B. An operational HVAC system that maintains temperature and humidity at occupancy levels must be in place; 

C. Adjacent and related work shall be complete; 

D. Ceiling, overhead ductwork and lighting must be installed; 

E. Site must be free of any further construction such as “wet work”; 

F. Required casework must be installed accurately and the project must be ready for fume hood installation. 

1.8 WARRANTY 

A. Furnish a written warranty that Work performed under this Section shall remain free from defects as to materials and workmanship for a period of two (2) years from date of shipment. Defects in materials and workmanship that may develop within this time are to be replaced without cost or expense to the Owner. 

Defects include, but are not limited to: 

1. Ruptured, cracked, or stained coating 

2. Discoloration or lack of finish integrity 

3. Cracking or peeling of finish 

4. Slippage, shift, or failure of attachment to wall, floor, or ceiling 

5. Weld or structural failure 

6. Warping or unloaded deflection of components 

7. Failure of hardware 

B. The warranty with respect to products of another manufacturer sold by Mott Manufacturing is limited to the warranty extended by that manufacturer to Mott Manufacturing. 

PART 2 – PRODUCTS 

2.1 MANUFACTURER 

A. Acceptable Manufacturer: 

Mott Manufacturing Ltd.; 452 Hardy Rd. Brantford, ON, Canada N3T 5L8. Tel: (519) 752-7825. Fax: (519) 752-2895. Email: inquire@mott.ca, www.mott.ca. 

B. Substitutions: 

Must meet design intent and all specification requirements and have prior approval. 

C. Requests for substitutions: 

All requests will be considered in accordance with provisions of Section 01 60 00. 

2.2 FUME HOOD MATERIALS 

A. Basic Materials NOTE: A complete list of basic materials is provided here. Not all models use all materials listed. 

1. Exterior Panels Framing Members and Furring Panels: Cold rolled and levelled mild steel and shall conform to ASTM A1008/A1008M, finished as in Para. 2.4. 

2. Screws: Interior fastening devices; stainless steel screws complete with corrosion resistant plastic caps. 

3. By-Pass: 18 Ga (1.2mm) thick mild steel down draft curved, finished same as exterior panels. 

4. Lower Foil: For hoods, form using 14 Ga (1.9mm) type 316-4 stainless steel. 

5. Safety Glass: Laminated type 6mm (1/4”) thick as per Section 11 53 00. 

6. Sash Guides: Track shall be corrosion resistant polyvinyl chloride (PVC). 

7. Sash Chain: #35 hardened 

8. Sprocket System for Sash Chain: Hardened sprockets with one full width shaft per sash running in ball bearings. 

9. Baffle Support Brackets: Fiberglass reinforced polyester thermoset resin of 3/16” (5mm) thickness. 

10. Baffle Support Brackets: Same material as hood lining. 

MOTT OPTIMA FUME HOOD SPEC REV-2 07/2012 11 53 13-6 

11. Duct Stubs: Bell shaped type 316, 18 Ga (1.2mm) stainless steel. 

12. Light Switches: Light switches shall be black in color, commercial spec grade or higher and shall be UL and CSA approved. 

13. Electrical Receptacles: Electrical receptacles shall be black in color, commercial spec grade or higher and shall be UL and CSA approved. 

14. Cover Plates: Electrical cover plates shall be black in color, nylon and UL and CSA approved. 

15. Fluorescent Fixture: Fixture shall be two tube rapid start or better. Energy saving cool white T8 lamps shall be provided. Ballast shall be sound rated to limit noise. 

16. Epoxy Counter Top: 1-1/4” thick white dished epoxy work top standard. 

17. Telescoping Drain: If a cup sink is required a telescoping drain pipe shall be included as well as a fixed plumbing cover below the worktop. 

B. Fume Hood Liner 

1. FRP: Hood linings and baffles shall be fiberglass reinforced polyester thermoset resin of 3/16” (5mm) thickness. The fiberglass reinforced polyester panel shall have a minimum flexural strength of 15,000 psi (103,400 kPa), with a flame spread of 25 or less as per ASTM #E84. Final appearance shall be smooth and white in colour. 

C. Fume Hood Furring Panels 

1. Where called for, provide matching furring panels to enclose the space between top edge of fume hoods and the finished ceiling. 

2. Panels shall be flanged, notched and reinforced where required to form a well-fitted enclosure, free from oil-canning. Secure panels using cadmium-plated, self-tapping screws; panels shall be removable for maintenance purposes. 

3. Finish shall match fume hood to which it is connected. 

4. Accent colored panels are available on fronts and sides. 

2.3 FUME HOOD CONSTRUCTION 

A. Fume hood superstructure shall be double narrow wall construction consisting of an outer shell of sheet steel and an inner hood liner. Double wall shall house and conceal steel framing members, attaching brackets and remote operating service fixture mechanisms. Overall double wall thickness: 3” maximum. 

B. Front double-wall posts shall be bull nosed and can accept up to 3 plumbing fixtures per side, located at ADA height only if the bottom fixture is for cold water. For standard applications corner posts can accept a maximum of five fixtures per side. Two electrical duplex outlets, light switch and optional monitor alarm where indicated on drawings located along apron unit. Electrical outlets and light switch shall be factory-wired and terminate at a junction box on roof of hood. All electrical components shall be UL listed/classified. 

1. Posts shall extend to the floor to support superstructure. If storage is required, use re-locatable cabinets. Vent as necessary. 

C. Exterior panel members shall be fastened by means of concealed inset devices. Exposed screws are not acceptable. 

D. Provide access to remote-controlled fixture outlets concealed between walls through removable panels on hood exterior and access panels on both inside liner walls. Assemble hood superstructure, fasten and connect inner and outer frame into a rigid self supporting entity. 

E. Install fluorescent lighting fixture on exterior of roof. Provide a 6mm (1/4”) safety glass panel on hood "roof", sealed to isolate the lighting fixture from fume chamber. The 2-lamp fixture in each hood shall be largest possible for fume hood size. Average interior illumination levels within the fume chamber shall be 80 foot candles minimum. Finish fixture interior with white baked enamel. 

F. Sash shall be laminated safety glass set into extruded polyvinyl chloride guide. Bottom and side sash rails shall be 18 Ga (1.2mm) stainless steel. Glass shall be set into rails with PVC glazing channel. Bottom of sash glass shall be ground and polished. A powder coated curved tubular sash handle shall be provided and attached to sash glass using screws and resilient bushings to prevent glass chipping. A single weight, chain, bearing and shaft, counter balance system shall be used for vertical operation of sash and prevent jamming to permit one finger operation at any point along full width sash pull. Single sash or combo sash shall be matched with counter balancing weight system to allow sash motion when seven pounds are applied. Sash shall open and close against rubber bumper stops. 

G. Self Closing Sash: A mechanism shall be provided which automatically lowers the sash to the chosen working height (height shall be specified at time of order). A latch shall be provided to hold the sash fully open for setup/teardown of experiments. Below the chosen working height, the sash shall be neutrally balanced and function as a conventional sash. 

H. Fume Hood shall have an electro-hydraulic height adjustable work surface with electric motor. Work surface shall have the flexibility to be raised or lowered from 30” to 36” to accommodate the requirements for individual users, different procedures or equipment. Height adjustment controls for the work surface are mounted to the apron. 

I. Hood shall be constant volume type with a built in automatic compensating by-pass to maintain constant exhaust volume regardless of sash position. By-pass shall be positive in action, and provided by curved, open top lintel panel in the area immediately above the top portion of the sash when closed. As the sash is lowered, the by-pass design limits the increase in face velocity to a maximum of 4-1/2 times average face velocity as measured with the sash fully open. 

J. Restricted Bypass Option for VAV Use: Standard upper bypass area is blocked by a fixed glass panel extending from the roofline of the hoof to the top edge of the closed sash in its lowest position. Bypass is restricted to a maximum opening of 1”. 

K. Perimeter of sash opening shall have a lower flush sill air foil and streamlined shape on side posts including a large radius on corners opening toward hood interior. Flush sill with hinged airfoil and spill trough shall be capable of passing electrical cords through including hospital grade plugs. 

L. Three-piece main baffles shall provide controlled air vectors into and through the fume hood and be fabricated of the same material as the liner. Provide fixed exhaust slots on the full perimeter of baffles. 

M. Design fume hoods to minimize static pressure loss with adequate slot area around the baffle and the exhaust collar. Measured average static pressure loss reading taken three diameters above the hood outlet from four points, 90o apart, shall not exceed the following values based on 60” (1524mm) wide hood: 

Face Velocity Measured Static Pressure Loss 

75 F.P.M. (0.38 m/s) 0.15” (45.8 Pa) 

100 F.P.M. (0.51 m/s) 0.20” (87.1 Pa) 

125 F.P.M. (0.64 m/s) 0.25” (136.9 Pa) 

N. Electrical duplex outlets and light switch shall be mounted in the height adjustable apron unit of the fume hood to maintain their proximity to the work surface. Electrical duplex outlets and light switch shall be pre-wired to a junction box mounted on top of fume hood superstructure. Electrical devices shall be UL classified/listed. 

O. Attach corrosion resistant labels to units as specified in Para. 1.4.D.4 

2.4 FUME HOOD EXTERIOR FINISH 

A. Coating performance data is available in Appendix 1 

2.5 AIR FLOW MONITOR / ALARM 

A. TEL AFA 1001 Mk3 digital airflow alarm or equivalent is available. 

PART 3 – EXECUTION 

4.1 INSTALLATION 

A. In addition to requirements of Section 11 53 13, install fume hoods in positions shown, align and set level with levelling devices. 

B. Work in close cooperation with allied trades installing ductwork, wiring and other services. 

C. Turn over to Mechanical Trades, service fitting remote control rods and valves for installation to fume hood superstructure and service lines. 

MOTT/SIGMA SPEC REV-5 7/06 11 53 13-1

SECTION 11 53 13

(FORMERLY 11610)

LABORATORY FUME HOODS (HOPEC)

PART 1 – GENERAL

Summary:

This Specification identifies the minimum material and construction standards that are required to

deliver a quality installation of laboratory fume hoods. Fume hoods shall be supplied in accordance with the

requirements of this Specification. The fume hoods identified in this Specification shall include the

miscellaneous metal panels and other related components as identified on the Drawings and that are

necessary for the complete installation.

Hoods shall function as ventilated, enclosed work spaces, designed to capture, confine and

exhaust fumes, vapours and particulate matter produced or generated within the enclosure.

1.1 SECTION INCLUDES

A. Laboratory Fume Hoods

1.2 RELATED SECTIONS

A. Division 09 Section 65 13, “Resilient Base and Accessories”

B. Division 12 Section 36 00, “Countertops”

C. Division 12 Section 35 53, “Manufactured Metal Casework

D. Division 12 Section 32 00, “Manufactured Wood Casework”

E. Division 13 Section 21 00, “Controlled Environment Rooms”

F. Division 22 Section 40 00, “Plumbing Fixtures”

G. Division 23 Section 30 00, “HVAC Air Distribution”

H. Division 26 Section 05 00, “Common Work Results for Electrical”

I. Related Work To Be Performed By Others:

1. Final installation of all plumbing, service and electrical fixtures attached to fume hood or

countertop (excluding piping and wiring within fume hoods).

2. Final connection to service lines of all plumbing, service and electrical fixtures attached to

laboratory casework or fume hoods.

1.3 REFERENCES

A. SEFA 1-2002: Laboratory Fume Hoods – Design, Materials, Use and Testing Guidelines

Science Equipment and Furniture Association (SEFA)

B. ISO 9001:2008 – Quality Management

International Standards Organization (ISO)

C. ADA (ATBCB ADAAG) Americans with Disabilities Act Accessibility Guidelines

Americans with Disabilities Act (ADA)

1.4 SUBMITTALS

Refer to Section 01 33 00, “Submittal Procedures,” for requirements, procedures, etc.

A. Product Data:

1. Drawings shall include data and details for construction of the laboratory fume hoods as well

as information regarding the name, quantity, type and construction of materials (such as

hardware, gauges, etc), that will be used to complete the project.

B. Shop Drawings:

1. The laboratory casework manufacturer shall furnish shop drawings illustrating the layout and

placement of all laboratory casework and fume hoods as well as any products included in this

section.

2. Indicate the type and location of all service fittings and associated supply connections.

3. Preparation instructions and recommendations.

4. Storage and handling requirements and recommendations.

5. Installation methods.

C. Selection Samples:

Submit the following:

1. One complete set of color chips representing the manufacturer’s full range of available colors.

Minimum sample size 2 inches by 3 inches (50mm x 76mm).

D. Quality Assurance/Control

1. Design Data/Test Reports: Manufacturer shall submit test data and design criteria which are

in compliance with the project specifications.

2. Performance: Fume Hoods, Sigma Systems “HOPEC” model, shall be designed to meet or

exceed the American Standard for Laboratory Ventilation and the American Industrial Hygiene

Association standard as described in ANSI/AIHA Z9.5. This standard of performance shall be

verified through factory testing in accordance with the established protocol as set out by the

ANSI/ASHRAE 110 standard.

3. Certificates: All certifications required in the specifications shall be submitted with the original

submittal package under separate cover. Certificates must be provided with the signature of a

qualified individual of the supplier.

4. Manufacturers’ Instructions: Provide manufacturer’s instructions for installation and

maintenance of all products provided and installed within this section. Instructions will be in

bound form, tabbed and organized by section number.

5. Submit copy of the corrosion resistant label to be attached to the fume hood exterior with

condensed information covering recommended locations for apparatus and accessories.

1.5 QUALITY ASSURANCE

A. Manufacturer Qualifications:

1. The following list of information will be provide to the Architect at least ten (10) days prior to

the bid opening:

2. List of manufacturing facilities;

3. Manufacturer of fume hoods shall have the capability within their facility of performing fume

hood tests based on the latest ANSI/ASHRAE Specification 110.

4. A list of ten (10) installations of comparable stature completed within the past 5 years;

5. Construction details depicting the materials, sizes and methods of construction;

B. Mock-Ups

1. Area mockups shall be as indicated on the shop drawings. Post bid mockup areas must be

priced for disassembly and reassembly and used within the project.

2. Do not proceed with remaining work until installation is approved by Architect.

a) Install base cabinet with specified hardware.

b) Install fume hood with specified fixtures.

1.6 DELIVERY, STORAGE AND HANDLING

A. Packaging, Shipping, Handling and Unloading

1. Packaging: Products shall have packaging adequate enough to protect finished surfaces from

soiling or damage during shipping, delivery and installation.

2. Delivery: Fume hood delivery shall only take place after painting, utility rough-ins and related

activities are completed that could otherwise damage, soil or deteriorate fume hoods in

installation areas.

3. Handling: Care, such as the use of proper moving equipment, experienced movers, etc., shall

be used at all times to avoid damaging the fume hoods. Until installation takes place, any

wrapping, insulation or other method of protection applied to products from the factory will be

left in place to avoid accidental damage.

B. Acceptance at Site:

1. Fume hoods will not be delivered or installed until the conditions specified under Part 3,

Installation section of this document have been met.

C. Storage:

1. Fume hoods shall be stored in the area of installation. If, prior to installation, it is necessary for

the fume hoods to be temporarily stored in an area other than the installation area, the

environmental conditions shall meet the environmental requirements specified under the

Project Site Conditions article of this section.

D. Waste Management and Disposal:

1. The supplier of the laboratory fume hoods are responsible for removing any waste or refuse

resulting from the installation of, or work pertaining to laboratory fume hoods; thereby leaving

the project site clean and free of debris. Trash container(s) to be provided by others.

1.7 PROJECT SITE CONDITIONS

A. Building must be enclosed (windows and doors sealed and weather-tight);

B. An operational HVAC system that maintains temperature and humidity at occupancy levels must

be in place;

C. Adjacent and related work shall be complete;

D. Ceiling, overhead ductwork and lighting must be installed;

E. Site must be free of any further construction such as “wet work”;

F. Required casework must be installed accurately and the project must be ready for fume hood

installation.

1.8 WARRANTY

A. Furnish a written warranty that Work performed under this Section shall remain free from defects

as to materials and workmanship for a period of two (2) years from date of shipment. Defects in

materials and workmanship that may develop within this time are to be replaced without cost or

expense to the Owner.

Defects include, but are not limited to:

1. Ruptured, cracked, or stained coating

2. Discoloration or lack of finish integrity

3. Cracking or peeling of finish

4. Slippage, shift, or failure of attachment to wall, floor, or ceiling

5. Weld or structural failure

6. Warping or unloaded deflection of components

7. Failure of hardware

B. The warranty with respect to products of another manufacturer sold by Mott Manufacturing is

limited to the warranty extended by that manufacturer to Mott Manufacturing.

PART 2 – PRODUCTS

2.1 MANUFACTURER

A. Acceptable Manufacturer:

Mott Manufacturing Ltd.; 452 Hardy Rd. Brantford, ON, Canada N3T 5L8. Tel: (519) 752-7825.

Fax: (519) 752-2895. Email: inquire@mott.ca, www.mott.ca.

B. Substitutions:

Must meet all specification requirements and have prior approval.

C. Requests for substitutions:

All requests will be considered in accordance with provisions of Section 01 60 00.

2.2 FUME HOOD MATERIALS

A. Basic Materials

NOTE: A complete list of basic materials is provided here. Not all models use all materials listed.

1. Exterior Panels Framing Members, and Furring Panels: Cold rolled and levelled mild steel and

shall conform to ASTM A1008/A1008M, finished as in Para. 2.4.

2. Screws: Interior fastening devices; stainless steel screws complete with corrosion resistant

plastic caps.

3. By-Pass Grilles: 18 Ga (1.2mm) thick mild steel directionally louvered upward, finished same

as exterior panels.

4. Upper front panel: to be 18 Ga (1.2mm) thick mild steel, with out By-Pass Grilles, finished

same as exterior panels.

5. Lower Foil: To be Type 316 stainless steel mounted behind the sash and sitting in a 2”

(50mm) deep trough flush with the counter top. For ease of cleaning, assembly shall swing up.

6. Safety Glass: Laminated type 6mm (1/4”) thick as per Section 11 53 00.

7. Sash guides: Track shall be corrosion resistant polyvinyl chloride (PVC).

8. Sash Cable: 3/32” (2mm) stranded stainless steel 7 x 19 construction.

9. Sash Chain: #35 hardened

10. Sprocket system for Sash Chain: Hardened sprockets with one full width shaft per sash

running in ball bearings.

11. Sash Pull: Type 316, 18 Ga (1.2mm) thick stainless steel with an AISI #4 satin finish.

12. Pulley Assembly For Sash Cable: 1-1/2” (38mm) diameter nylon rim, ball bearing roller, with

cable retaining device. Provide interior access panels on both sides, and secure using special

moulded white vinyl gasket designed to be removed and reinstalled without use of special

tools.

13. Baffle support brackets: Fiberglass reinforced polyester thermoset resin of 3/16” (5mm)

thickness.

14. Duct Stubs: Bell shaped Type 316, 18 Ga (1.2mm) stainless steel.

15. Light Switches: Light switches shall be black in color, commercial spec grade or higher and

shall be UL and CSA approved.

16. Electrical receptacles: Electrical receptacles shall be black in color, commercial spec grade or

higher and shall be UL and CSA approved.

17. Cover Plates: Electrical cover plates shall be black in color, nylon and UL and CSA approved.

18. Flourescent Fixture: Fixture shall be two tube rapid start or better. Energy saving cool white

T8 lamps shall be provided. Ballast shall be sound rated to limit noise.

B. Fume Hood Liner

1. FRP: Hood linings and baffles shall be fiberglass reinforced polyester thermoset resin of 3/16”

(5mm) thickness. The fiberglass reinforced polyester panel shall have a minimum flexural

strength of 15,000 psi (103,400 kPa), with a flame spread of 25 or less as per ASTM #E84.

Final appearance shall be smooth and white in colour.

2. Stainless steel:

a) 316 s/s square corners.

b) 316 s/s radiused corners.

C. Fume Hood Furring Panels

1. Where called for, provide matching furring panels to enclose the space between top edge of

fume hoods and the finished ceiling.

2. Panels shall be flanged, notched and reinforced where required to form a well-fitted enclosure,

free from oilcanning. Secure panels using cadmium-plated, self-tapping screws; panels shall

be removable for maintenance purposes.

3. Finish shall match fume hood to which it is connected.

2.3 FUME HOOD CONSTRUCTION

A. Fume hood superstructure shall be double wall construction consisting of an outer shell of sheet

steel and an inner hood liner. Double wall shall house and conceal steel framing members,

attaching brackets and remote operating service fixture mechanisms. Overall double wall

thickness; 4-3/4” (121mm) maximum.

B. Front double-wall posts shall be pre-punched to accept up to 5 plumbing fittings per side, two

electrical duplex outlets, light switch and optional monitor alarm where indicated on drawings.

Electrical outlets and light switch shall be factory-wired and terminate at a junction box on roof of

hood. All electrical components shall be UL listed/classified.

C. Exterior panel members shall be fastened by means of concealed devices. Exposed screws are

not acceptable.

D. Provide access to remote-controlled fixture valves concealed between walls through removable

panels on hood exterior and access panels on both inside liner walls. Assemble hood

superstructure, fasten and connect inner and outer frame into a rigid self supporting entity.

E. Install fluorescent lighting fixture on exterior of roof. Provide a 6mm (1/4”) safety glass panel on

hood "roof", sealed to isolate the lighting fixture from fume chamber. The 2-lamp fixture in each

hood shall be largest possible for fume hood size. Average interior illumination levels within the

fume chamber shall be 80 foot candles minimum. Finish fixture interior with white baked enamel.

F. Fume hood sash shall be full view combination vertical rising, and horizontal sliding type providing a

clear and unobstructed side to side view of fume hood interior. Horizontal sash shall be laminated

safety glass not greater than 18” (460mm) wide set into extruded aluminium shoes with PVC gaskets.

Each shoe shall ride on 2 nylon rollers locked in the vertical sash to avoid inadvertent removal.

Vertical edges of sash glass panels to have a clear plastic edge guard. Vertical sash shall rise in a

flush PVC track. Bottom, top and side sash rails shall be 18 Ga (1.2mm) stainless steel welded to

form an integral structure. Bottom rail shall be an integral, formed, full width, flush pull and shall be

anchored on each side to sash cables at bottom. A single weight, pulley, cable, counter balance

system shall be used for vertical operation of sash and prevent jamming to permit one finger

operation at any point along full width sash pull and to maintain sash at any position without creep.

Sash system shall be designed to prevent sash drop in the event of chain or cable failure.

Superstructure shall have a single sash and counter balance system. Sash shall open and close

against rubber bumper stops.

G. Hood sash shall raise vertically into an enclosure box to assure a leak free chamber.

H. Fume hood sash shall be a combination Vertical / Horizontal sash. Vertically rising frame shall be

of stainless steel construction grade 316 or better. Horizontal sliding panels shall be 6mm (1/4”)

laminated safety glass with integral ground-in pulls. Sides of horizontal panels shall be protected

with snap-on plastic edge guard. Horizontal sliding panels shall ride on rollers in an extruded

aluminium bottom and top track with positive locking system to prevent inadvertent removal. Sash

counterbalance mechanism shall be either chain or cable as required in main hood specification.

Fume hoods shall also be equipped with a fixed panel located nominally 1” (25mm) behind the

sash plane, covering the space between the interior roof of the fume hood and the upper edge of

the sash frame. 1” (25mm) space shall be left open to provide downwardly vectored by-pass air,

thus reducing dead space behind closed sash.

I. Hood shall be variable volume type without a built in automatic compensating by-pass.

J. Perimeter of sash opening shall have a lower air foil and streamlined shape side and top with

angled opening toward hood interior. Air shall enter under the bottom horizontal foil through a

nominal 1” (25mm) by-pass when the sash is in the closed position. Bottom foil shall be removable

without the use of special tools. Sash shall close on air foil. Floor mounted hoods shall not be

equipped with a lower airfoil. A one inch gap shall be provided to prevent vapour build-up behind

closed lower sash.

K. Three-piece main baffles shall provide controlled air vectors into and through the fume hood and

be fabricated of the same material as the liner. Provide exhaust slots on the full perimeter of

baffles, with adjustable valves for top and both sides of baffles. A fixed, permanently-open,

horizontal slot located at 31-1/2” (800mm) above the work surface shall be provided at the

overlapping mid-point of the main baffles.

L. Remote-Control Baffle System:

1. Adjustment shall be instantaneous, one handed, with a single point control, accomplished

while hood is in use, without disturbing apparatus.

M. Manual-Control Baffle System:

1. Baffle positions should only be set by qualified personal experienced with fume hood

balancing.

N. For safety, fume hood shall maintain essentially constant exhaust volume at any baffle position.

Changes in average face velocity and exhaust volume as a result of baffle adjustment shall not

exceed 5% for any baffle position at the specified face velocity.

O. Design fume hoods to minimize static pressure loss with adequate slot area around the baffle and

the bell shaped exhaust collar configuration. Measured average static pressure loss reading taken

three diameters above the hood outlet from four points, 90o apart, shall not exceed the following

values based on 60” (1524mm) wide hood:

Face Velocity Measured Static Pressure Loss

75 F.P.M. (0.38 m/s) 0.15” (45.8 Pa)

100 F.P.M. (0.51 m/s) 0.20” (87.1 Pa)

125 F.P.M. (0.64 m/s) 0.25” (136.9 Pa)

P. Electrical convenience duplex outlets shown mounted on the face of fume hoods shall be installed

in front posts and pre-wired to a junction box mounted on top of fume hood superstructure.

Electrical devices shall be UL classified/listed.

Q. Sash height shall be limited to have two sets of integral sash height limiting hardware mounted on

the hood which prevents raising the vertical sash above certain points unless manually defeated by

the operator. Set points shall be closed and at 15” (381mm) above counter top.

R. Bottom slot covered with stainless steel screen. Screen to be mounted horizontally behind baffle as

low as possible. Screen to be 3/4” (19mm) x 3/4” (19mm) 18 ga pattern.

S. The minimum sash height shall be 36” (915mm) with a 6” (152mm) clear static panel mounted at

the top of the sash.

T. Attach corrosion resistant labels to units as specified in Para. 1.4.D.4

2.4 FUME HOOD EXTERIOR FINISH

A. Coating Performance data is available in Appendix 1

2.5 AIR FLOW MONITOR / ALARM

A. TEL AFA 1001 Mk3 digital airflow alarm or equivalent shall be provided.

PART 3 – EXECUTION

3.1 INSTALLATION

A. In addition to requirements of Section 11 53 13, install fume hoods in positions shown, align and

set level with levelling devices.

B. Work in close cooperation with allied trades installing ductwork, wiring and other services.

C. Apply small bead of sealant to junction of fume hood counter top and adjacent hood liner.

D. Turn over to Mechanical Trades, service fitting remote control rods and valves for installation to

fume hood superstructure and service lines.