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SECTION 11610
LABORATORY FUME HOODS
NOTE ** Labconco Corporation, laboratory fume hoods; bench-
mounted, radioisotope, perchloric acid, and walk-in
types.
NOTE **
NOTE ** This section is based on the products of Labconco
Corporation, which is located at:
NOTE ** 8811 Prospect Avenue
NOTE ** Kansas City, MO 64132
NOTE ** Tel: (816) 333-8811
NOTE ** Tel: (800) 821-5525
NOTE ** Fax: (816) 363-0130
NOTE ** E-mail: labconco@labconco.com
NOTE ** Home Page: www.labconco.com
NOTE ** Labconco Corporation is a manufacturer of
laboratory equipment, including fume hoods, self-
contained filtered laboratory enclosures, and
biological safety cabinets. This section covers
part of their product line: "Protector" laboratory
fume hoods; bench-mounted types, by-pass and
auxiliary air design configurations, vapor-proof
and explosion-proof electrical configurations, with
accompanying service fixtures, as well as by-pass
air design radioisotope, perchloric acid, and walk-
in type fume hoods. See their other sections for
self-contained filtered laboratory enclosures and
biological safety cabinets.
NOTE **
NOTE ** SECTION 11610 - LABORATORY FUME HOODS, Copyright
1998, The Architect's Catalog, Inc.
PART 1 GENERAL
1.1 SECTION INCLUDES
NOTE ** Delete items below not required for project. If
multiple types or sizes of fume hoods are required
for project, carefully modify this section for
specific applications.
A. Fiberglass bench-mounted fume hoods.
B. Stainless steel radioisotope fume hoods with automatic by-
pass air flow system for use with remotely-located
motor/blower.
C. Stainless steel perchloric acid fume hoods with automatic
by-pass air flow system for use with remotely-located
motor/blower.
D. Fiberglass walk-in fume hoods with automatic by-pass air
flow system for use with remotely-located motor/blower.
1.2 RELATED SECTIONS
NOTE ** Delete sections below not relevant to this project;
add others as required.
A. Section 11600 - Laboratory Equipment.
B. Section 12351 - Laboratory Casework.
C. Section 15400 - Plumbing.
D. Section 16200 - Electrical.
1.3 REFERENCES
NOTE ** Delete references from the list below that are not
actually required by the project; add others as
required.
A. AGA - American Gas Association.
B. ANSI Z 9.5 - Laboratory Ventilation.
C. ASHRAE 110 - Method of Testing Performance of Laboratory
Fume Hoods.
D. ASTM E 84 - Surface Burning Characteristics of Building
Materials.
E. CGA - Canadian Gas Association.
F. NFPA 45 - Fire Protection for Laboratories Using
Chemicals.
G. SEFA 1 - Laboratory Fume Hoods.
H. ________________________________.
1.4 SUBMITTALS
A. Submit under provisions of Section 01300.
B. Product Data: Manufacturer's catalog data, specification
sheets, and product manuals.
C. Shop Drawings: Prepared specifically for this project;
show dimensions and interface with other products.
D. Selection Samples: Hood exterior wall material, interior
liner and baffle, epoxy work surface material, and front
panel color chips.
1.5 QUALITY ASSURANCE
A. Maintain testing facility at manufacturer's place of
business for testing and evaluating laboratory fume hoods
under both ideal and adverse conditions, in accordance
with ASHRAE Standard 110.
B. Make manufacturing facility, testing facility, and
quality control procedures available for owner
inspection.
C. Manufacturer Qualifications: Minimum 5 years
manufacturing fume hoods as a principal product.
1.6 DELIVERY, STORAGE AND HANDLING
A. Deliver fume hoods, work surfaces, and accessories free
of damage.
B. Store and handle in a manner to prevent damage to fume
hoods, work surfaces, accessories, or adjacent work.
1.7 WARRANTY
A. Warrant against defects in materials and workmanship on
fume hoods, work surfaces, and accessories; include labor
and replacement parts (except lamps).
B. Warranty Period: One year from date of installation or
two years from date of purchase, whichever is sooner.
PART 2 PRODUCTS
2.1 MANUFACTURERS
A. Acceptable Manufacturer: Provide products made by
Labconco Corporation, 8811 Prospect, Kansas City, MO
64132. ASD. Tel: (816) 333-8811 or (800) 821-5525.
Fax: (816) 363-0130.
B. Requests for substitutions will be considered in
accordance with provisions of Section 01600.
NOTE ** Delete paragraph above or below; coordinate with
Division 1 requirements.
C. Substitutions: Not permitted.
D. Provide all laboratory fume hoods from a single
manufacturer.
2.2 MANUFACTURED UNITS
NOTE ** Select items below required for project. If
multiple types or sizes of fume hoods are required,
carefully modify subsequent paragraphs for specific
applications.
A. Fiberglass bench-mounted fume hoods.
B. Stainless steel radioisotope fume hoods with automatic by-
pass air flow system for use with remotely-located
motor/blower.
C. Stainless steel perchloric acid fume hoods with automatic
by-pass air flow system for use with remotely-located
motor/blower.
D. Fiberglass walk-in fume hoods with automatic by-pass air
flow system for use with remotely-located motor/blower.
NOTE ** Select one of the following two subparagraphs for
fiberglass bench-mounted fume hoods; delete both
subparagraphs for other types of fume hoods (by-
pass air flow is standard).
1. By-pass air flow design configuration.
2. Auxiliary air flow design configuration.
NOTE ** Select one of the following two subparagraphs.
3. Vapor-proof electrical configuration.
4. Explosion-proof electrical configuration.
NOTE ** Select one of the following two subparagraphs for
fiberglass bench-mounted fume hoods; delete both
subparagraphs for other types of fume hoods (remote
blowers are standard).
5. For use with remote blowers.
6. For use with built-in blowers.
NOTE ** Select one of the following two subparagraphs.
7. No service fixtures.
8. Remotely controlled service fixtures.
NOTE ** Select one of the following three subparagraphs;
the third is a custom option.
9. Vertical-rising sashes.
10. Horizontal sliding sashes.
11. Combination horizontal/vertical sliding sashes.
NOTE ** Include the subparagraph below for fiberglass bench-
mounted fume hoods with automatic by-pass air flow
design and select size(s).
12. Size:
a. 4 foot (1.22 m): 47 inches wide, 59 inches high,
32-1/4 inches deep (1.19 x 1.50 x 0.82 m).
b. 5 foot (1.52 m): 59 inches wide, 59 inches high,
32-1/4 inches deep (1.50 x 1.50 x 0.82 m).
c. 6 foot (1.83 m): 70 inches wide, 59 inches high,
32-1/4 inches deep (1.78 x 1.50 x 0.82 m).
d. 8 foot (2.44 m): 96 inches wide, 59 inches high,
32-1/4 inches deep (2.44 x 1.50 x 0.82 m).
NOTE ** Include the subparagraph below for fiberglass bench-
mounted fume hoods with auxiliary air flow design
and select size(s).
13. Size:
a. 4 foot (1.22 m): 47 inches wide, 59 inches high,
42-1/4 inches deep (1.19 x 1.50 x 1.07 m).
b. 5 foot (1.52 m): 59 inches wide, 59 inches high,
42-1/4 inches deep (1.50 x 1.50 x 1.07 m).
c. 6 foot (1.83 m): 70 inches wide, 59 inches high,
42-1/4 inches deep (1.78 x 1.50 x 1.07 m).
d. 8 foot (2.44 m): 96 inches wide, 59 inches high,
42-1/4 inches deep (2.44 x 1.50 x 1.07 m).
NOTE ** Include the subparagraph below for either
radioisotope fume hoods or perchloric acid fume
hoods and select size(s).
14. Size:
a. 4 foot (1.22 m): 47 inches wide, 59 inches high,
32-1/4 inches deep (1.19 x 1.50 x 0.82 m).
b. 5 foot (1.52 m): 59 inches wide, 59 inches high,
32-1/4 inches deep (1.50 x 1.50 x 0.82 m).
c. 6 foot (1.83 m): 70 inches wide, 59 inches high,
32-1/4 inches deep (1.78 x 1.50 x 0.82 m).
NOTE ** Include the subparagraph below for walk-in fume
hoods and select size(s).
15. Size:
a. 5 foot (1.52 m): 59 inches wide, 95 inches high,
32-1/4 inches deep (1.50 x 2.41 x 0.82 m).
b. 6 foot (1.83 m): 70 inches wide, 95 inches high,
32-1/4 inches deep (1.78 x 2.41 x 0.82 m).
c. 8 foot (2.44 m): 96 inches wide, 95 inches high,
32-1/4 inches deep (2.44 x 2.41 x 0.82 m).
2.3 MATERIALS
A. Sheet Steel: ASTM A 366.
B. Stainless Steel: ASTM A 167, types as specified.
NOTE ** Select paragraph below for bench-mounted fiberglass
fume hoods.
C. Work Surfaces for Bench-Mounted Fume Hoods: Black epoxy
resin.
NOTE ** Select paragraph below for walk-in fume hoods.
D. Floor Surfaces for Walk-In Fume Hoods: Black epoxy
resin.
2.4 FINISHES
A. Exterior Sheet Steel Surfaces: Properly prepared and
coated, electrostatically applied.
1. Hood Exterior: Epoxy coating, dry powder.
NOTE ** Select one of the following two subparagraphs; the
first is standard, the second is optional.
2. Hood Front Panel: Baked-on dry powder epoxy coating,
electrostatically applied; glacier white.
3. Hood Front panel: Wet enamel overspray, color
selected by Architect.
B. Stainless Steel: Finishes as specified.
C. Fiberglass Interior Liners and Baffles: Chemically-
resistant white gel-coat, flame spread less than 25 per
ASTM E 84.
2.5 COMPONENTS
A. Hood Exteriors: Minimum 20 gage cold-rolled sheet steel.
NOTE ** Select the following paragraph for bench-mounted
fume hoods and walk-in fume hoods.
B. Hood Interior Liners: One-piece molded fiberglass
reinforced polyester resin, minimum 3/16 inch (5 mm)
thick, with coved corners; no interior access panels.
(Maintenance performed from front of hood.)
C. Baffles: Removable, tamper-resistant one-piece molded
fiberglass reinforced polyester resin, minimum 3/16 inch
(5 mm) thick.
NOTE ** Select the following paragraph for radioisotope
fume hoods.
D. Hood Interior Liners, Baffles, and Work Surfaces: One-
piece Type 304 stainless steel welded construction,
minimum 20 gage, with 5 inch (127 mm) cupsink, coved
corners, joints ground smooth and polished; no interior
access panels. (Maintenance performed from front of
hood.)
NOTE ** Select the following paragraph for perchloric acid
fume hoods.
E. Hood Interior Liners, Baffles, and Work Surfaces with
Drain Trough: One-piece Type 316 stainless steel welded
construction, minimum 20 gage, fully coved corner, bottom
with drain trough at rear, joints ground smooth and
polished; no interior access panels. (Maintenance
performed from front of hood.)
NOTE ** Select subparagraph below if walk-in fume hoods are
not specified.
1. Provide baffles without slots or adjustment
capability.
NOTE ** Delete subparagraph above and include subparagraphs
below for walk-in fume hoods. Delete subparagraphs
below for all other types of fume hoods.
2. Provide adjustment capability at upper edge of lower
baffles.
3. Provide other baffles without slots or adjustment
capability.
F. Corner Covers: 20 gage stainless steel, pre-punched and
plugged to accommodate up to four service fixtures and
two electrical boxes on each side.
G. Hood Rear Exterior Panels: 16 gage galvanized sheet
steel.
NOTE ** Select paragraph below for bench-mounted and walk-
in fume hoods.
H. Belled Entry Cones, Belled Exhaust Connection and
Condensation Collection Rings: LS 8200 PVC(R) as
manufactured by Georgia Gulf Company; include neoprene
drain hose.
NOTE ** Select paragraph below for radioisotope fume hoods.
I. Exhaust Connection Rings: Type 304 stainless steel.
NOTE ** Select paragraph below for perchloric acid fume
hoods.
J. Duct Connections: Type 316 stainless steel.
NOTE ** Select paragraph below for bench-mounted and walk-
in fume hoods.
K. Hose Connectors: Injection molded PVDF - Kynar7.
NOTE ** Select paragraph below for radioisotope and
perchloric acid fume hoods.
L. Hose Connectors: Chrome-plated brass.
M. Hood Sashes: 3/16 inch (5 mm) thick tempered safety
glass surrounded in an extruded polyvinyl chloride (PVC)
frame.
NOTE ** Delete paragraph below if only walk-in fume hoods
are specified.
N. Sash Foils: 14 gage cold-rolled steel, epoxy coated.
NOTE ** Select items below required for the project.
Specialty service fixtures are available upon
request, including oxygen with specially cleaned
and lubricated valve, cold water gooseneck with
vacuum breaker, and stainless steel valves with
stainless steel lines for purified water.
O. Hood Service Fixtures: 1/4 inch (6 mm) copper tubing,
forged brass valves and seats, TFE-coated silicone bronze
stem, TFE packing, and injection-molded PVDF 10-serration
hose connectors.
1. Fixture Handles: Anti-snag, round plastic without
projections; color-code and label for designated
service.
P. Gas Valves: AGA/CGA listed with tin-lined copper service
lines.
NOTE ** Select paragraph below for vapor-proof bench-
mounted and vapor-proof walk-in fume hoods.
Q. Fluorescent Light Fixtures: Two-tube fixtures (tubes
included).
NOTE ** Select paragraph below for explosion-proof bench-
mounted and explosion-proof walk-in fume hoods, and
for all radioisotope and perchloric acid fume
hoods.
R. Incandescent Light Fixtures: Explosion-proof 100-watt,
115-volt, 50/60 Hz fixtures (bulbs included).
NOTE ** Select paragraph below for bench-mounted fume
hoods.
S. Work Surfaces, Bench-Mounted Fume Hoods: 1-1/4 inches
(32 mm) thick, 3/8 inch (10 mm) deep dished solid epoxy
resin surface conforming to hood interior.
NOTE ** Select paragraph below for radioisotope fume hoods.
T. Work Surfaces, Radioisotope Fume Hoods: Type 304
stainless steel, 1/4 inch (6 mm) deep dished seamless
surface welded to hood interior, joints ground smooth and
polished; provide supporting substrate to satisfactorily
mount hood to base cabinet.
NOTE ** Check local codes for possible required treatment
of effluent water before including the following
paragraph.
1. Stainless steel cup sink, 5 inch (127 mm) diameter,
left front, with 1-1/2 inch (38 mm) drain.
NOTE ** Select paragraph below for perchloric acid fume
hoods.
U. Work Surfaces, Perchloric Acid Fume Hoods: Type 316
stainless steel, 1/4 inch (6 mm) deep dished seamless
surface welded to hood interior, joints ground smooth
and polished; provide supporting substrate to
satisfactorily mount hood to base cabinet.
NOTE ** Check local codes for possible required treatment
of effluent washdown water before including the
following paragraph.
1. Washwater drain trough at rear edge, with 2 inch (50
mm) drain connection at right end.
NOTE ** Select paragraph below for walk-in fume hoods.
V. Floor Surfaces: 1-1/4 inches (32 mm) thick surface
conforming to hood interior.
NOTE ** The following options are available for walk-in
fume hoods. Distillation grid design can vary;
consult manufacturer. Distillation grid is not
factory installed, as hood is shipped in two
pieces; supporting holes in liner with collar
mounted will be provided in liner walls for field
installation of grid.
W. Work Surfaces, Walk-In Fume Hoods: 1-1/4 inches (32 mm)
thick, with 6 inch by 3 inch (150 x 75 mm) oval cutouts
to clear molded cup sinks.
X. Removable Internal Support Bench (to convert hood for
distillation use): 1 inch (25 mm) thick epoxy, 15 inches
(380 mm) high by 15 inches (380 mm) deep by internal
width of fume hood.
NOTE ** Choose distillation grid in the following paragraph
from 316 stainless steel, aluminum, or fiberglass
1/2 inch (13 mm) diameter rods, 316 stainless steel
or aluminum connectors.
Y. Distillation Grid: ________________________.
2.6 FABRICATION
NOTE ** Select any of the following four paragraphs
required for project.
A. Fabricate bench-mounted fume hoods in one piece, double
wall construction, epoxy coated cold-rolled steel
exterior, gel-coated fiberglass reinforced polyester
internal liner and baffle, able to pass through a 33 inch
(0.84 m) opening without disassembly.
B. Fabricate radioisotope fume hoods in one piece, double
wall construction, epoxy coated cold-rolled steel
exterior, type 304 stainless steel internal liner and
baffle, joints welded and ground smooth, able to pass
through a 33 inch (0.84 m) opening without disassembly.
C. Fabricate perchloric acid fume hoods in one piece, double
wall construction, epoxy coated cold-rolled steel
exterior, type 316 stainless steel internal liner and
baffle, able to pass through a 33 inch (0.84 m) opening
without disassembly.
D. Fabricate walk-in fume hoods as two individual
assemblies, double wall construction, epoxy coated cold-
rolled steel exterior, gel-coated fiberglass reinforced
polyester internal liner and baffle, each assembly able
to pass through a 33 inch (0.84 m) opening without
further disassembly.
NOTE ** Select paragraph below for 4, 5, and 6 foot (1.22,
1.52, and 1.83 m) hoods with vertical rising sash
assemblies.
1. Provide vertical rising 3/16 inch (5 mm) thick
tempered safety glass sash framed with extruded
polyvinyl chloride; epoxy-coated steel sash tracks;
single counterbalance weight.
NOTE ** Paragraph below is standard for 8 foot (2.44 m)
hoods.
2. Provide postless dual vertical rising sash of
independent sash assemblies, 3/16 inch (5 mm) thick
tempered safety glass framed with extruded polyvinyl
chloride; epoxy-coated steel sash tracks; single
counterbalance weight.
NOTE ** Paragraph below is optional for 4 foot (1.22 m) by-
pass hoods. Horizontal sashed hoods are not
available in auxiliary-air configurations.
3. Provide two horizontal sliding panels, 3/16 inch (5
mm) thick tempered safety glass sash, each framed
with extruded polyvinyl chloride; epoxy-coated steel
sash tracks; single counterbalance weight.
NOTE ** Paragraph below is optional for 5, 6,and 8 foot
(1.52, 1.83, and 2.44 m) by-pass hoods. Horizontal
sashed hoods are not available in auxiliary-air
configurations.
4. Provide four horizontal sliding panels, 3/16 inch (5
mm) thick tempered safety glass sash, each framed
with extruded polyvinyl chloride; epoxy-coated steel
sash tracks; single counterbalance weight.
NOTE ** Combination sashes are available on some hood sizes
and designs. Contact the manufacturer and select
from one of the two subparagraphs following.
5. Combination Sash: Two horizontal sliding sashes in
an epoxy coated vertical rising frame; single
counterbalance weight.
6. Combination Sash: Four horizontal sliding sashes in
an epoxy coated vertical rising frame; single
counterbalance weight.
NOTE ** Select paragraph below for by-pass fume hoods.
E. Fabricate by-pass fume hoods to minimize face velocity
fluctuations as sash is raised or lowered.
NOTE ** Select paragraph below for bench-mounted by-pass
fume hoods.
1. Inflow velocity with sash positioned 6 inches (150
mm) above air foil: Not less than twice the selected
full open face velocity, nor greater than three times
that amount.
NOTE ** Select paragraph below for bench-mounted auxiliary
air fume hoods.
F. Fabricate auxiliary-air fume hoods with by-pass air
feature to minimize face velocity fluctuations as sash is
raised or lowered.
1. Inflow velocity with sash positioned 6 inches (150
mm) above air foil: Not less than twice the selected
full open face velocity, nor greater than three times
that amount.
2. Introduce auxiliary air above sash face as an
integral part of hood superstructure with removable
plenum air deflector.
3. Provide up to a maximum of 50 percent ratio of
auxiliary air to total air exhaust volume, as
determined by the intended application.
4. Measure exhaust air volume with sash fully open and
auxiliary air off, to develop face velocity profile.
NOTE ** Select paragraph below for bench-mounted and walk-
in fume hoods.
G. Equip fume hoods with belled entry cones, complete with
condensation collectors and drain tubes, providing for
exhaust connection leading from fume cavity.
NOTE ** Select paragraph below for radioisotope fume hoods.
H. Equip fume hoods with duct connections.
NOTE ** Select paragraph below for perchloric acid fume
hoods.
I. Equip fume hoods with internal washdown systems to wash
behind baffle, serviced by additional cold water valve
and supply lines. Provide connection points, plugged
upon delivery, for connecting to internal manifold for
feed to duct system wash rings.
J. Equip fume hoods with interchangeable lift-away side
panels and removable front panels to access plumbing
fixtures, electrical wiring, counterbalance sash weights,
and lighting fixtures; access all services from front of
hoods.
K. Mount corner covers vertically on each side of hood sash
openings to access plumbing lines and valve connections
from front of hoods.
NOTE ** Select paragraph below for bench-mounted,
radioisotope, and perchloric acid fume hoods.
L. Provide minimum 4 inch (100 mm) wide air foil directly
across bottom of sash opening, allowing air to bypass
underneath and sweep across work surface and preventing
back flow of fumes at front of hood. Extend air foil
back under sash to prevent closure of lower by-pass
opening when sash is fully closed.
NOTE ** Select paragraph below for walk-in fume hoods.
M. Provide 1 inch (25 mm) high air passage directly across
bottom of sash opening, allowing air to bypass underneath
and sweep across floor surface and preventing back flow
of fumes at front of hood.
NOTE ** Select paragraph below for 4, 5, and 6 foot (1.22,
1.52, and 1.83 m) fume hoods.
N. Counterbalance sash with a single weight suspended by two
vinyl coated stainless steel cables passing through nylon
ball bearing pulleys.
NOTE ** Select paragraph below for 8 foot (2.44 m) fume
hoods with dual vertical-rising sash.
O. Counterbalance each sash assembly with individual
weights, each suspended by two vinyl coated stainless
steel cables passing through nylon ball bearing pulleys.
NOTE ** Paragraph below is standard for 5 and 6 foot (1.52
and 1.83 m) walk-in fume hoods.
P. Counterbalance dual telescoping vertical-rising sash with
a single weight for the top sash, dual weights for the
bottom sash, suspended by two vinyl coated stainless
steel cables passing through nylon ball bearing pulleys.
NOTE ** Select paragraph below for 8 foot (2.44 m) walk-in
fume hoods; horizontal sliding sash assembly is
optional for 5 and 6 foot (1.52 and 1.83 m) walk-in
fume hoods.
Q. Provide four-piece horizontal sliding sash system in dual
track.
NOTE ** Select one of the two paragraphs below for 4, 5,
and 6 foot (1.22, 1.52, and 1.83 m) bench-mounted
and perchloric acid fume hoods.
R. Service fixtures are not required.
S. Provide four fixtures located inside fume hood cavity,
capable of hot and cold water, natural gas, air, vacuum,
nitrogen, argon, and low pressure steam services.
NOTE ** Select paragraph below for radioisotope fume hoods.
T. Provide three fixtures located inside fume hood cavity,
capable of hot and cold water, natural gas, air, vacuum,
nitrogen, argon, and low pressure steam services.
NOTE ** Paragraph below is standard for 8 foot (2.44 m)
hoods.
U. Provide six fixtures located inside fume hood cavity,
capable of hot and cold water, natural gas, air, vacuum,
nitrogen, argon, and low pressure steam services.
NOTE ** Select paragraph below for walk-in fume hoods.
V. Provide swing-type gooseneck cold water fixtures with
vacuum breaker; mount over molded 6 inch by 3 inch (150 x
75 mm) cupsink with 1-1/4 inch (32 mm) standard drain
connection.
NOTE ** Select one subparagraph below. Walk-in fume hoods
can have one or two goosenecks.
1. Left rear.
2. Right rear.
3. One at left rear and one at right rear.
NOTE ** Delete four paragraphs below if service fixtures
are not required. Select all four paragraphs for
bench-mounted and walk-in fume hoods with service
fixtures; delete first paragraph and select
remaining three paragraphs for radioisotope and
perchloric acid fume hoods with service fixtures.
W. Orient hose connectors to the rear of fume hoods.
X. Orient hose connectors to be readily accessible without
exposing operator's breathing zone to fume hood interior.
Y. Completely pre-plumb services using 1/4 inch (6 mm) tin-
lined copper tubing for upper right-hand gas fixture, 3/8
inch (10 mm) copper tubing for cold water gooseneck
fixtures, 1/4 inch (6 mm) copper tubing for other
fixtures.
Z. Provide minimum 66 inch (1.67 m) feed lines to service
fixtures.
NOTE ** Select paragraph below for 4, 5, and 6 foot (1.22,
1.52, and 1.83 m) vapor-proof bench-mounted fume
hoods and for 5 and 6 foot (1.52 and 1.83 m) vapor-
proof walk-in fume hoods.
AA. Provide fluorescent light fixture located behind tempered
glass safety shield, serviceable from outside fume hood
cavity. Include light switch, blower switch, and all
internal wiring to circuit junction boxes located in
upper right and/or left front of plenum area.
NOTE ** Select paragraph below for 8 foot (2.44 m) vapor-
proof bench-mounted fume hoods and for 8 foot (2.44
m) vapor-proof walk-in fume hoods.
BB. Provide two fluorescent light fixtures located behind
tempered glass safety shield, serviceable from outside
fume hood cavity. Include light switch, blower switch,
and all internal wiring to circuit junction boxes located
in upper right and/or left front of plenum area.
NOTE ** Select paragraph below for 4, 5, and 6 foot (1.22,
1.52, and 1.83 m) explosion-proof bench-mounted
fume hoods and for 5 and 6 foot (1.52 and 1.83 m)
explosion-proof walk-in fume hoods.
CC. Provide incandescent light fixture without internal
wiring, switches, or receptacles.
NOTE ** Select paragraph below for 8 foot (2.44 m) bench-
mounted explosion-proof fume hoods, 8 foot (2.44 m)
walk-in explosion-proof fume hoods, 4 and 5 foot
(1.22 and 1.52 m) radioisotope vapor-proof, 4 and 5
foot (1.22 and 1.52 m) perchloric acid explosion-
proof fume hoods, 4, 5, and 6 foot (1.22, 1.52, and
1.83 m) explosion-proof radioisotope fume hoods,
and 4, 5, and 6 foot (1.22, 1.52, and 1.83 m)
explosion-proof perchloric acid fume hoods.
DD. Provide two incandescent light fixtures without internal
wiring, switches, or receptacles.
NOTE ** Select paragraph below for 6 foot (1.83 m)
radioisotope vapor-proof fume hoods and 6 foot
(1.83 m) perchloric acid vapor-proof fume hoods.
EE. Provide three incandescent light fixtures without
internal wiring, switches, or receptacles.
NOTE ** Select paragraph below for 4, 5, and 6 foot (1.22,
1.52, and 1.83 m) vapor-proof bench-mounted fume
hoods and vapor-proof perchloric acid fume hoods.
FF. Provide one 115-volt, 3-wire polarized and grounded
electrical duplex receptacle mounted in right corner
cover assembly; wire to separate electrical circuit.
NOTE ** Select paragraph below for 8 foot (2.44 m) vapor-
proof bench-mounted fume hoods.
GG. Provide two 115-volt, 15-amp, 60 Hz electrical duplex
receptacles, one mounted on each side; wire receptacles
to separate electrical circuits.
NOTE ** Select paragraph below for 4, 5, and 6 foot (1.22,
1.52, and 1.83 m) vapor-proof radioisotope fume
hoods.
HH. Provide one 115-volt, 3-wire polarized and grounded
electrical duplex receptacle mounted in right corner
cover assembly and one 230-volt 10-amp receptacle mounted
on right side; wire receptacles to separate electrical
circuits with 230-volt receptacle sheathed in flex
conduit coiled in the plenum without junction box.
NOTE ** Select paragraph below for vapor-proof walk-in fume
hoods.
II. Provide two 115-volt, 3-wire polarized and grounded
electrical duplex receptacles, one mounted in each corner
cover assembly; wire receptacles to separate electrical
circuits.
NOTE ** Select two paragraphs below for bench-mounted fume
hoods.
JJ. Provide work surfaces with cutout relief holes for
passage of service utility lines.
KK. Provide vent holes at rear edge of work surfaces for
connection to provision for venting of acid or solvent
storage cabinets.
NOTE ** Select paragraph below for walk-in fume hoods.
LL. Provide floor surfaces with cutout relief holes for
passage of service fixture lines.
NOTE ** Select first paragraph below for 4 and 5 foot (1.22
and 1.52 m) fume hoods; select second paragraph
for 6 and 8 foot (1.83 and 2.44 m) fume hoods.
1. Quantity: One.
2. Quantity: Two.
NOTE ** Delete paragraphs below that are not required for
the project.
MM. Provide 6 inch by 3 inch (150 by 75 mm) oval epoxy
cupsinks in work surfaces, each with 1-1/2 inch (38 mm)
drain connection.
NOTE ** Select subparagraph below for quantity required.
1. Quantity: One.
2. Quantity: Two.
3. Quantity: _________.
NN. Factory-modify fume hoods to include bypass block, sash
position alarm, and sash stop(s) to conserve air loss.
OO. Provide face velocity alarms to monitor hood performance,
for factory or field installation.
NOTE ** The following paragraph is an option for vapor-
proof fume hoods, however, consideration should be
given to explosion-proof fume hoods for this
situation.
PP. Provide fire suppression system for installation in fume
hood interior.
PART 3 EXECUTION
3.1 EXAMINATION
A. Verify equipment rough-in before proceeding with work,
including rough opening dimensions required for fume hood
installation.
B. Coordinate with other trades for proper installation of
plumbing and electrical services.
3.2 INSTALLATION
A. Install in accordance with manufacturer's instructions;
comply with standards required by authorities having
jurisdiction.
B. Install equipment plumb, square, and straight, without
distortion; securely anchor.
C. Schedule installation to ensure that utility connections
are achieved in an orderly and expeditious manner.
D. Demonstrate fume hood operations and functions to Owner
at completion of installation.
3.3 ADJUSTING AND CLEANING
A. Adjust operating equipment, with the exception of air
moving equipment, to provide efficient operation for
intended use and as required by manufacturer.
NOTE ** Select subparagraph below for fume hoods with
vertical-rising sashes.
1. Vertical-Rising Sashes: Operate smoothly without
tilting when raised or lowered from either end;
remain at rest in any open position.
NOTE ** Select subparagraph below for fume hoods with
horizontal sliding sashes.
2. Horizontal Sliding Sashes: Operate smoothly without
binding.
B. Clean equipment, casework, countertops, and other
surfaces as recommended by manufacturer, rendering work
in new and unused appearance.
C. Clean adjacent construction and surfaces soiled in the
course of installation of this work.
D. Touch up minor damaged surfaces caused by installation.
Replace damaged components as directed by Architect.
3.4 PROTECTION
A. Provide protective measures to prevent equipment and
surfaces from exposure to other construction activity.
END OF SECTION