MDACC Project No. XX-XXXX
A/E Name
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Month, 00, 0000
SECTION 11 53 13 – LABORATORY FUME HOODS
PART 1 - GENERAL
1.01
RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General Conditions and Division
01 Specification Sections, apply to this Section.
B. Specifications throughout all Divisions of the Project Manual are directly applicable to this
Section, and this Section is directly applicable to them.
1.02
SUMMARY
A. Furnish and install pre-piped and pre-wired chemical fume hoods, and radioisotope hoods,
including bench mounted hoods, floor mounted hoods, high performance hoods, and full
view hoods, complete with accessories.
1.03
REFERENCE STANDARDS
A. The latest published edition of a reference shall be applicable to this Project unless identified
by a specific edition date.
B. All reference amendments adopted prior to the effective date of this Contract shall be
applicable to this Project.
C. All design tested performance, materials, installation, and workmanship shall comply with all
applicable requirements and standards.
1. ASHRAE 110 - Method of Testing Performance Fume Hoods.
2. OSHA, Federal Register 29 CFR Part 1910 - Occupational Exposures to Hazardous
Chemicals in Laboratories.
3. ANSI/AIHA Z9.5 - Laboratory Ventilation.
4. NFPA 45 - Standard on Fire Protection for Laboratories Using Chemicals.
5. Underwriters Laboratories, UL 1805 Laboratory Hoods and Cabinets
6. Scientific Apparatus Makers Association Standard for Laboratory and Hospital Service
Fittings.
D. Work shall conform to the recommended practices of the Scientific Equipment and Furniture
Association (SEFA), except as superseded by this specification.
1. SEFA 1: Fume Hoods.
2. SEFA 2: Installation.
3. SEFA 3: Laboratory Work Surfaces.
4. SEFA 7: Fixtures.
5. SEFA 8M: Laboratory Grade Metal Casework.
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DEFINITIONS
A. Plumbing Services Fittings: Gas, air, vacuum, steam, and water valves and faucets; remote
control valves, and vacuum breakers.
B. Electric Services Fittings: Convenience outlets, switches, and control panels.
C. Plumbing Services Lines: Gas, air, vacuum, steam, water piping, and associated fittings
necessary to carry respective services from service fixtures through equipment to building
rough-in outlets in floors or walls.
D. Electric Service Lines: Conduit, junction boxes, conduit fittings, and wire necessary to carry
electrical services from service fixtures through equipment to building rough-in outlets in
floors and walls.
E. Visible Surfaces: Exterior surfaces of closed cabinets, backs of cabinet doors, interior
surfaces and shelves of open cabinets and of cabinets with glass or glazed doors.
1.05
QUALITY ASSURANCE
A. Coordinate work of the Section with Section 12 35 53 (Laboratory Casework).
B. Provide interface products of style, material finish and color in order to produce a
homogenous installation.
C. Qualifications:
1. Fume Hood Manufacturer:
a.
Work in this Section, with respect to the specific equipment specified herein, shall
be manufactured by a firm having a minimum eight years documented experience,
with an established organization and production facilities including all tools,
equipment and special machinery necessary for specializing in the fabrication and
installation of the type of equipment required, and with skilled personnel, factory
trained workmen and an experienced engineering department. Each shall have
the demonstrated knowledge, ability, and proven capability to produce the
specified equipment of the required quality, as well as the proven capacity to
complete an installation of this type within the required time limits.
2. Fume Hood Installer:
a.
1.06
Fume hoods shall be installed by the manufacturer, or installing contractor shall be
approved in writing by the hood manufacturer for the installation of the specified
products.
SUBMITTALS
A. Submit as specified herein and under the provisions of Section 01 31 00.
B. Product Data:
1. Description of hoods, including construction details, materials, gauges, sash lock and
release procedure, hardware cut sheets, piping of equipment, wiring and/or control
diagrams, including voltage and amperage, and description of re-lamping procedures.
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2. Statement giving face velocity, minimum and maximum airflow, and pressure drop at
design operating volume at the operating sash position for each size hood. Note that
minimum airflow shall comply with ANSI Z9.5 requirements.
3. Description of proposed factory dynamic testing procedures.
4. Complete materials list, including catalog data of all materials, equipment, fan curves,
test designs, performance charts, and products for work specified in this Section.
5. Liner and work surface chemical resistance test data.
C. Samples: Submission of samples may be required, before fabrication has begun, to clearly
show the following:
1. Each type of specified finish and color range available, or as identified on Drawings.
2. Each plumbing service fitting.
3. Each electric service fitting.
D. Shop Drawings:
1. Submit complete shop fabrication and installation drawings, including plans, elevations,
sections, dimensions, materials and metal gauge sizes, details, fittings, duct connections,
schedules, and piping and vents from cabinets below, where applicable. Show
relationship to adjoining materials and construction such as details of field joints between
units and in tops. Show all fastening types and locations for securing units in place.
Identify and show locations, size, and details of filters if they are required.. Identify
connection points, locations, and sizes of building services and systems. Provide clear
identification where equipment requirements deviate from the service/utility provisions in
the Construction Documents. Shop Drawings shall be in electronic format, as well as in
the form of reproducibles or photocopies, not to exceed 11 by 17 inch (A3) in size. Blueline prints are not acceptable.
2. Coordinate shop drawing submittals of both this Section and Section 12 35 53
(Laboratory Casework) so that each recognizes and incorporates the other’s products.
E. Air Flow Tests and Certification
1. Fume Hoods: Provide “As Manufactured” (AM) certification before shipping that each
type and size of fume hood has achieved an AM performance rating equal or better than
0.05 ppm for five minute average with 4.0 Lpm tracer gas release rate at maximum
possible sash opening when tested in accordance with ASHRAE 110.
2. Test reports shall include who performed the tests, the procedures, and the results.
3. Owner will approve certification firm.
4. Owner representative may witness tests.
5. Final approval of testing and acceptance of reports shall be by Owner’s Environmental
Health and Safety Department.
F. Fume Hood Sound Level Certification
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1. Provide certification of fume hood compliance with design criteria for maximum allowable
noise within laboratories.
2. Provide test data of octave band analysis verifying fume hood is capable of a 50 NC
value when connected to a 50 NC HVAC source. Measurements shall be taken 36
inches in front of full open sash, 60 inches above the floor at the specified face velocity.
G. Record Documents:
1. Provide record approved product data, shop drawings, samples, test reports, and
certifications.
2. Operations/Maintenance Manuals:
a.
Complete operating and maintenance manuals that describe proper operating
procedures, maintenance and replacement schedules, component parts list, wiring
diagrams, and closest factory representative for components and service.
3. Submit certification by an independent testing company stating the equipment is installed
per applicable and referenced codes and standards, adjusted and balanced for design
operations, and is complete and ready for intended function.
a.
1.07
Certify that fume hoods will not exceed design maximum airflow at specified
operating conditions.
PRODUCT HANDLING
A. Contractor shall schedule the delivery of fume hoods when spaces are sufficiently complete
so materials can be installed immediately following delivery.
B. Protection: Use all means necessary to protect work of this section before, during and after
installation including installed work and materials of other trades.
C. Replacement: Any damaged work shall be replaced, repaired, and restored to original
condition to the approval of the Architect at no additional cost or inconvenience to the Owner.
1.08
WARRANTY
A. Provide five (5) year warranty on all parts and labor to fix defects in materials and
workmanship for all non-movable parts (except lamps).
B. Provide two (2) year warranty against defects for all control and electrical devices.
PART 2 - PRODUCTS
2.01
GENERAL
A. All materials shall meet or exceed all applicable referenced standards, federal, state, and
local requirements and conform to codes and ordinances of authorities having jurisdiction.
2.02
PLUMBING SERVICE FITTINGS
A. Provide types of fittings necessary for the services and pressures indicated on Drawings.
B. Vacuum breakers shall not be installed under exhaust hoods or similar locations that will
contain toxic fumes or vapors.
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C. Finish: Polished chrome on brass body with a clear acid and solvent resistant epoxy coating
unless specified otherwise.
D. Equip valve handles with color coded plastic index buttons as follows:
Service
Indexing
Button Color
Lettering Color
Cold Water (Potable/IW)
Hot Water (Potable)
Lab Air
Natural Gas
Vacuum
Deionized Water
Reverse Osmosis
Carbon Dioxide
Oxygen
Nitrogen
Argon
Helium
Hydrogen
Specialty Gas
CW
HW
AIR
GAS
VAC
DI
RO
CO2
O2
N2
AR
HE
H2
SG
Green
Red
Orange
Dk. Blue
Yellow
White
White
Pink
Lt. Green
Brown
Violet
Black
Pink
Lt. Blue
White
White
Black
White
Black
Black
Black
Black
Black
White
White
White
Black
Black
E. Manufacturers:
1. Chicago Faucets.
2. Watersaver Faucet Co., Inc.
3. Substitutions are not permitted.
4. All fittings supplied under this Section shall be by the same manufacturer.
F. Chemical and Radioisotope Fume Hood Fittings:
1. Provide fittings as scheduled on Drawings.
2.03
ELECTRIC SERVICE FITTINGS
A. Provide types of fittings necessary for the services indicated on the Drawings.
2.04
FUME HOODS
[REFER TO OWNERS DESIGN GUIDELINE ELEMENT D304202 FOR SPECIFYING A HIGH PERFORMANCE
FUME HOOD DESIGN. DELETE ARTICLE BELOW IF NOT APPLICABLE.]
[ARCHITECT/ENGINEER MUST DELETE EVERYTHING IN BLUE AND IN BRACKETS BEFORE PUBLISHING.]
A. High Performance Chemical Fume Hoods:
1. Acceptable Manufacturers:
a.
Flow Safe, Inc., 30 Broad Street, Denville, NJ 07834. Tel: 919-372-9140
1) ‘Flow Safe Vortex II’, or approved equivalent.
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[THE HOOD LISTED BELOW IS APPROPRIATE FOR GENERAL PURPOSE USE, BUT MAY NOT BE
APPROPRIATE FOR USE IN CHEMISTRY LABS DUE TO ITS COMPARITIVELY LIMITED DEPTH OF USABLE
SPACE INSIDE. FOR CHEMISTRY LABS, CONFIRM WITH OWNER HOW HOODS ARE TO BE USED, AND
TYPE/SIZE OF APPARATUS TO BE ACCOMODATED.]
b.
Labconco Co., 8811 Prospect Ave, Kansas City, MO 64132. Tel: 800-821-5525
1) ‘Protector XStream’, or approved equivalent.
c.
Lab Crafters, Inc., 2085 Fifth Avenue, Ronkonkoma, NY 11779. Tel: 631-4717755
1) ‘Air Sentry’, or approved equivalent.
d.
Another approved manufacturer able to meet the specifications set forth herein.
[REFER TO OWNERS DESIGN GUIDELINE ELEMENT D304202 FOR SPECIFYING A STANDARD CHEMICAL
FUME HOOD DESIGN. DELETE ARTICLE BELOW IF NOT APPLICABLE.]
B.
Standard Chemical Fume Hoods:
1. Acceptable Manufacturers:
a.
Kewaunee Scientific Co.: Hallmark Casework, 3413 Greenridge Drive, Houston,
TX 77057. Tel: 713-783-7780
1) ‘Supreme Air LV’, or approved equivalent.
b.
Fisher Hamilton Scientific, Inc., 14665 Rothgeb Dr., Rockville, MD 20850. Tel:
920-793-1121
1) ‘Hamilton SafeAire II’, or approved equivalent.
[THE HOOD LISTED BELOW IS APPROPRIATE FOR GENERAL PURPOSE USE, BUT MAY NOT BE
APPROPRIATE FOR USE IN CHEMISTRY LABS DUE TO ITS COMPARITIVELY LIMITED DEPTH OF USABLE
SPACE INSIDE. FOR CHEMISTRY LABS, CONFIRM WITH OWNER HOW HOODS ARE TO BE USED, AND
TYPE/SIZE OF APPARATUS TO BE ACCOMODATED.]
c.
Mott Mfg, 452 Hardy Road, Brantford, Ontario, Canada N3T 5L8, Tel: 519-7527825
1) ‘RFV2’ (Reduced Face Velocity), or approved equivalent.
d.
Another approved manufacturer able to meet the specifications set forth herein.
C. Underwriters Laboratory Listing: Fume hoods shall be UL listed and labeled for compliance
with UL 1805. Label shall be attached to the face of each fume hood indicating classification
to the UL 1805 Standard for Laboratory Fume Hoods.
D. Materials: The following materials shall be provided, unless superseded by the requirements
listed below for specific fume hood types.
1. Steel:
a.
ASTM A366 high quality, cold rolled, mild steel, and free from rust, scale,
scratches, buckles, ragged edges, and other defects.
b.
Minimum thickness shall be 18-gauge.
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2. Stainless Steel:
a.
Type 304, ASTM A240/240M, with exposed surfaces ground and polished to a No.
4 finish. Minimum thickness shall be 16-gauge.
b.
Welding: All stainless steel welding material shall be of similar type to sheet
material. Welds shall be made without discoloration, ground, polished, and
passivated to blend with a No. 4 finish.
3. Liner and Work Surface:
a.
Typical High Performance Chemical Fume Hoods and Standard Chemical Fume
Hoods:
1) Fiberglass reinforced polyester liner, 1/4 inch thick, having a flame spread index
of 25 or less per ASTM E 84. Color: white. Panels shall have at least a
"Laboratory Grade finish" when tested per the chemical spot test in the Scientific
Equipment and Furniture Association (SEFA) 8 Standard.
2) Epoxy Resin work surface, 1-1/4 inch thick, light in color, having excellent
chemical resistance, good heat resistance, and dished 3/8 inch for containment.
b.
Radioisotope or Specified Chemical Fume Hoods:
1) One-piece 16 gauge stainless steel, with all corners welded, coved, and ground.
Work surface shall be reinforced for a minimum load rating of 200 pounds per
square foot. Provide work surface with 1/2 inch marine edge, in compliance with
Section 12 35 53 requirements.
4. Baffle: Material to match liner.
5. Glass: Minimum 7/32 inch laminated safety glass. Glass shall not be etched with
manufacturer’s name, logo, or any other permanent markings, other than to identify the
glass as being safety glass in compliance with ANSI Z97.1. Wired glass is not allowed.
6. Sash Pull: Full width corrosion-resistant steel with chemical resistant powder coating,
stainless steel, or plastic.
7. Gaskets: White, 70 durometer PVC for interior access panels. Gasket interior access
panels to eliminate air leakage and to retain liquids inside the hood.
8. Fasteners:
a.
Exterior structural member attachments shall be corrosion resistant material;
exposed screws are not acceptable.
b.
Exposed exterior fastening devices shall be concealed; exposed screws are not
acceptable.
c.
Interior fastening devices: Except where specifically allowed by this Specification,
interior fastening devices shall be concealed; exposed screws or caps are not
acceptable.
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9. Distillation Racks: Lattice style 1/2 inch diameter vertical and horizontal Duralumin rods
and rod clamps to form a lattice of approximate 12 inch squares. Bench hoods shall
have three horizontal rods, and walk-in and distillation hoods shall have six. Required in
all 8 foot chemistry lab hoods and other hoods as shown on Drawings.
10. Instruction Plate: Corrosion resistant plate attached to the fume hood exterior with
condensed information covering recommended locations for apparatus and accessories,
use of sash, and recommended safe operating procedures.
E. Construction:
1. Superstructure for Chemical Fume Hoods: Rigid, self-supporting assembly of double wall
construction, maximum 4-7/8 inch thick. Wall shall consist of a sheet steel outer shell
and a corrosion-resistant inner liner and shall house and conceal steel framing members,
piping, wiring, attaching brackets, and remote operating service fixtures, mechanisms,
and services. Panels shall be attached to a full frame construction, minimum 14 gauge
galvanized members. Panels and brackets shall be attached to eliminate screw heads
and metallic bracketry from the hood interior. Front panels shall be factory-punched for
service fittings, electrical, control and monitoring equipment. Provide stainless steel,
epoxy- or urethane-coated plug buttons for holes not used.
2. Support structure: Accommodate a distributed load of 250 psf and a single concentrated
load of 500 lbs. in addition to the hood weight.
3. Dimensions: Maximum depth for hoods up to 6 feet in width is 37 inches. Maximum depth
for hoods 7 feet wide and wider is 39 inches.
4. Access Panel: Access to fixture valves and piping concealed in wall shall be through
flush access panels on the inside liner walls or through removable front posts. Panels
shall be secured with fitted gasket, and tamperproof, epoxy- or urethane-coated,
countersunk, flat head screws, or similar method, providing a tight fit. Hook and loop type
attachments and panels held by gravity are not acceptable.
5. Restricted Bypass Fume Hoods for Variable Air Volume or Constant Volume Exhaust
Systems with Airfoil: Bypass shall be achieved through low resistance opening at front of
hood.
6. Airfoil: The airfoil shall allow ample room for electrical hospital grade cords to fit beneath
it. Sill shall pivot forward to provide cord and trough access. Bottom horizontal foil shall
provide nominal 1 inch bypass when sash is in the closed position. Bottom foil shall not
be removable without use of special tools.
a.
Sill shall consist of a half-round bullnose on front edge. Airfoil and sill shall be flush
with the height of the work surface. A secondary containment trough shall be
located in front of the work surface and extend below the airfoil sill.
7. Fume Hood Sash:
a.
Vertical Sash: Vertical rising sash with auto-return pre-set to an 18 inch opening
and full-open lock-out, typical for 4 foot and 5 foot fume hoods or as indicated on
Drawings.
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b.
Split Sash: Vertical rising post-less split sash, each sash being pre-set to an 18
inch opening and full-open lock-out, typical for 6 foot fume hoods. Vertical rising
post-less split sash, each sash having auto sash operator, typical for 8 foot fume
hoods or as indicated on Drawings.
c.
Combination Sash: Horizontal panels shall be hung from permanently sealed roller
bearings with rollers located outside of the contaminated fume hood. Horizontal
sliding sashes shall be two or three tracks as indicated on Drawings. Horizontal
sash shall have finger pulls on each panel. Each panel shall ride on rollers
supported from top rail only per ANSI/AIHA Z 9.5. Sash frame shall be
constructed and reinforced to support added weight. Glass panels shall have edge
guards on all vertical surfaces. Bottom of sashes shall include self cleaning guides
and shall require less than 5 lb-force to operate sashes while meeting fire code
requirements for explosion/blast user protection. The sash panels shall be
between 12 inch minimum and 16 inch maximum width. Optional for 4 foot, 5 foot,
6 foot, and 8 foot chemical fume hoods, and as indicated on Drawings.
8. Counter Balance System: Single weight, sprocket and chain, counter balance system to
prevent sash tilting and permit ease of operation at any point along full width pull.
Maximum 5 pounds pull shall be required to raise or lower sash throughout its full length
of operating sash opening. Design system to hold sash at any position without creep and
to prevent sash drop in the event of chain failure. Sash shall open and close against
rubber bumper stops.
a.
Sashes shall have the capability to be raised to full 28 inch, nominal, vertical
opening for loading or unloading of large apparatus.
9. Exhaust Slots:
a.
Slot air velocity: 1500 fpm minimum.
b.
Locate controls to minimize tampering and interference with normal hood
operation.
c.
Maximum slot area shall be less than two-thirds of the cross sectional area of the
respective parts of the plenum.
d.
Locate horizontal slots at counter top level, center and top section of hood.
10. Exhaust requirements: Operate hood at the following face velocity and air flow as
indicated on Drawings.
a.
High PerformanceFume Hoods:
1) Exhaust air flow – Refer to Drawings.
2) Face velocity – To be no lower than manufacturer’s published safe velocity.
Fume hood shall comply with testing requirements referenced in Part 1 and Part
3 of this Specification.
b.
Standard Fume Hoods:
1) Exhaust air flow – Refer to Drawings.
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2) Face velocity – 100 fpm is the preferred for standard hoods. Fume hood shall be
within a range from 60 fpm to 150 fpm. Fume hood shall comply with testing
requirements referenced in Part 1 and Part 3 of this Specification.
11. Ceiling Closure Panels: Provide 18 gauge steel paneled enclosure from top of hood to
the ceiling. Enclosure shall include hinged or removable door to access hood lighting
fixture. Finish shall match superstructure exterior. Panels shall terminate 2-3 inches
above finished ceiling, where provided, or at 9 feet above finished floor where there is no
finished ceiling. Panels shall terminate 1 inch below ceiling if hood does not provide a
bypass means to prevent the drawing of air from above ceiling.
12. Trim and Side Panels: Provide matching steel trim and side panels, as required to finish
any openings around and between hoods. Finish shall match superstructure exterior.
13. Finished Back: 18 gauge steel sheet. Finish shall match superstructure exterior.
14. Exhaust Collar:
a.
Provide contoured 20 gauge exhaust collar and transition piece, if necessary, to
receive circular exhaust duct connection and rubber collar by Division 23. Collar
and transition piece shall receive urethane powder coating if exposed to view.
Collar shall include duct transition if collar diameter is less than the duct diameter
indicated on the HVAC ductwork drawings. Collar shall be stainless steel if hood
has stainless steel liner.
15. Cup Sink:
a.
Provide on all fume hoods except radioisotope. Hoods shall be provided with a
single cup sink located on the right hand side (as determined when facing the
hood).
b.
Rectangular with raised rim and integral to work surface. Size in accordance with
Drawings.
c.
Plumbed to lab waste system with polypropylene tail-piece and trap unless
otherwise indicated on Drawings.
d.
Raised Rim Height: 1/4 inch.
16. Locate sinks and associated service fittings 6 inch minimum beyond hood face. Locate
cup sinks and associated service fittings at back of hood unless indicated otherwise.
17. All fume hoods shall be pre-piped. Piping within hoods shall be as specified in Division 22
for respective system, and shall additionally comply with the following:
a.
No pipes less than 1/2 inch shall be provided.
b.
For gas, provide schedule 40 black iron.
c.
For vacuum and air provide type K copper medical gas tubing.
d.
No flex connectors shall be used on gas; all gas shall be hard piped.
18. Base Cabinet Support Unit:
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Provide standard metal casework.
[TYPICALLY RETAIN ONE OR BOTH OF THE ARTICLES BELOW, AND DELETE ARTICLE ABOVE. CONFIRM
PROJECT REQUIREMENTS FOR ACID AND SOLVENT STORAGE].
b.
Provide solvent storage cabinet meeting requirements of OSHA, Section
1910.106(d) (3) or NFPA 30, Section 9.5 unless indicated otherwise. Cabinet shall
be prepared for venting, with flame arrestor screen at vent inlets and bungs in
place to provide seal. Cabinet doors shall be self closing.
c.
Provide vented acid storage cabinet. Vent shall not penetrate the work surface.
Provide flame arrestor screen at vent inlets. Cabinet doors shall be self-closing.
19. Service Fittings: As shown on Drawings and specified in Section 11 53 43 (Laboratory
Service Fittings and Fixtures), factory-installed and complete with all gaskets, grommets,
and sleeves.
20. Alarm and Controls:
a.
Coordinate cut outs for fume hood alarm and controls to be provided under
Division 25. All cut outs for alarm and controls shall be made in the factory; field
cutting is not acceptable.
b.
The controller/monitor shall have the ability to digitally communicate with a building
automation system.
21. Electrical Receptacles:
a.
Flush mounting, 120V/20A duplex type, single gang, NEMA 5-20R, hospital grade,
3-wire, grounding type receptacle, one per side, or as indicated on the Drawings,
with brushed stainless steel cover plate.
b.
Color: Receptacles shall be red to indicate their connection to emergency power.
22. Interior Fume Hood Lighting:
a.
Lighting within hood shall be provided by a protected fluorescent lighting fixture
with two lamps (32W T8, medium bi-pin, 85 CRI, electronic ballast, instant start)
operated by an exterior switch with stainless steel cover plate located on the face
of the fume hood. Lamp size shall not exceed 48 inches; provide multiple fixtures
as required.
b.
Provide safety glass panel cemented and vapor-tight sealed to the hood roof.
c.
Light level: Average light level on the work surface shall be 80 foot-candles (860
lux), minimum.
d.
Re-lamping shall be achieved from outside the hood enclosure.
e.
Light fixture shall be U.L. listed.
f.
Color: Switch shall be red to indicate its connection to emergency power.
g.
Lamps and ballasts shall be provided per manufacturers in Section 26 51 00
(Lighting Fixtures).
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23. Safety Label:
a.
Provide self-adhesive polyester label, as described on the Drawings. Labels shall
indicate safe operating conditions with respect to fume hood sash position. Labels
solely indicating face velocity at sash position are not acceptable.
b.
Manufacturer: Lab Safety Supply Inc., P. O. Box 1368, Janesville, WI 53547, Tel:
800 356-0783, or approved substitution.
24. Hood Finish: Fume hood finish shall comply with SEFA 8M Cabinet Surface Finish
performance requirements.
25. Exterior Color:
a.
As selected by Architect from manufacturer's full color line and complying with
finish requirements.
b.
Exterior of fume hood to match color of adjacent casework.
[FOR THE ARTICLE BELOW, REFER TO DESIGN GUIDELINE ELEMENT D304202 FOR SPECIFYING A
CONSTANT VOLUME RADIOISOTOPE FUME HOOD. DELETE ARTICLE BELOW IF NOT APPLICABLE].
F. Radioisotope Hoods
1. Sash Pull: Full width stainless steel.
2. Construction:
a.
Superstructure: Rigid, self-supporting assembly of double wall construction,
maximum 4-7/8 inch thick. Wall shall consist of a sheet steel outer shell and a
integral stainless steel liner and work surface, and shall house and conceal steel
framing members, attaching brackets, and remote operating service fixture
mechanisms and services. Panels shall be attached to a full frame construction,
minimum 14 gauge galvanized members. Panels and brackets shall be attached to
eliminate screw heads and metallic bracketing from hood interior.
3. Sash Cable: Uncoated, 1/8 inch, stainless steel cable.
4. Pulley Assembly for Sash Cable: 2 inch diameter, zinc dichromate finish, ball bearing
type, with cable retaining device. Nylon tire not acceptable.
5. Cup sinks shall not be installed in radioisotope hoods.
PART 3 - EXECUTION
3.01
EXAMINATION
A. Prior to installation of the Work of the Section, carefully inspect the installed Work specified in
other sections and verify that all such Work is complete to the point where this installation
may properly commence.
B. Verify that all Work has been installed in complete accordance with the original design,
received submittals, and the manufacturer’s recommendations.
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C. In the event of discrepancy, immediately notify the Architect. Do not proceed with installation
in areas of discrepancy until all such discrepancies have been fully resolved.
3.02
INSTALLATION
A. Work in this Section requires close coordination with Work specified in Divisions 22, 23, 25,
and 26 as well as installation by Owner of Owner furnished components. Coordinate all Work
to ensure an orderly process in the Project, without removal of previously installed Work, and
so as to prevent damage to finishes and products.
B. Coordinate location and alignment of fume hoods and base cabinet support units for proper
connection of all piping and duct work.
C. Install all equipment in accordance with manufacturer’s written instructions, applicable codes
and regulations, accepted Shop Drawings, and as necessary for a complete operating
system.
D. Floor Supported Work: Set in position, level and fasten to adjacent units as required. Fasten
counter tops to base cabinets. Seal tops and splashes to abutting vertical surfaces. Install
filler panels between cabinets and walls.
E. Wall mounted Work: Fasten in place to bracing provided in wall system.
F. Where cup sinks are indicated for fume hoods, coordinate alignment so the sink is centered
below water fitting outlet and minimizes splashing.
G. Provide and install transition section as required between hood and ductwork.
H. Install acid and solvent storage cabinet(s) under hood and install concealed vent(s) as
required.
1. Vent acid storage cabinet(s) to the interior of the hood with 1-1/4 inch polyolefin vent
assembly to space above the work surface. Vent shall not penetrate the work surface.
[TYPICALLY DELETE ARTICLE BELOW. SOLVENT CABINETS ARE VENTED ONLY IN SITUATIONS WHERE
LARGE QUANTITIES OF CHEMICALS GIVING OFF ODORS ARE USED. CONFIRM WITH OWNER THAT
VENTING IS DESIRED.]
2. Where required by Drawings, remove bungs from solvent/flammable storage cabinet(s).
Coordinate with work of division 23, which will provide vent of 1-1/2 inch diameter
schedule 20 galvanized threaded pipe connected into the hood exhaust duct above
transition piece and connection coupling. . Venting shall not occur inside hood.
3.03
I.
Connect electrical and mechanical services indicated on Drawings to devices furnished with
hood.
J.
Maintain space over hood sash clear of ductwork, conduit, and piping for 9 feet above
finished floor to allow full opening of sash.
FIELD TESTING
A. Provide two week advance notice of scheduled testing.
B. Fume hood field tests shall be performed by a qualified independent testing company on
each hood to determine face velocity and air flow patterns.
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MD Anderson Cancer Center
MS110612
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MDACC Project No. XX-XXXX
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1. Owner will approve testing firm.
2. Owner’s representative shall witness tests.
3. Final approval of testing and acceptance of reports shall be by Owner’s Environmental
Health and Safety department.
C. Balance, test, and certify each fume hood in accordance with ASHRAE 110 “As Installed” (AI)
for Flow Visualization, Face Velocity, and Tracer Gas Containment Testing Requirements.
1. Fume hoods shall achieve an AI performance rating equal to or better than 0.05 ppm with
4.0 Lpm tracer gas release rate at maximum possible sash opening when tested in
accordance with ASHRAE 110.
D. Balancing of the system is in the scope of work of Division 23.
E. Verify exhaust air quantity does not exceed design, plus allowable leakage.
F. Verify hood pressure drop does not exceed design.
G. Adjust and retest hoods that do not meet specified performance.
H. Replace hoods which do not meet standards after repetitive testing.
3.04
ADJUSTING, CLEANING, AND PROTECTION
A. Adjusting:
1. Repair or remove and replace defective Work as approved by the Architect upon
completion of installation.
2. Adjust all moving or operating parts to function within their design parameters.
B. Cleaning: Remove debris from area of installation daily and at completion of Project.
C. Protection: All units are to be protected before, during and after installation. Damaged
materials due to improper protection shall be cause for rejection.
END OF SECTION 11 53 13
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