SECTION 115313 Ð LABORATORY FUME HOODS AND RELATED PRODUCTS


PART 1 -  GENERAL
1.01 SUMMARY
A. Section Includes:
1. Bench-top High-Performance Laboratory Fume Hoods.
2. Service fixtures (ie. water, gas, etc.) and electrical service fittings in fume hoods.
3. Piping and wiring within service fittings, light fixtures, switches, and other electrical devices.
4. Fume hood base support.
5. Work Surfaces within fume hoods.
6. Laboratory sinks and cup sinks in fume hoods.
7. Filler panels and ceiling enclosures for fume hoods.
B. Related Sections:
1. Section             : Furnish and installation of plumbing utilities and final connections to fume hoods.
2. Section             : Furnishing and installation of exhaust duct work and equipment, and final connection of hoods.
3. Section                : Furnishing and installation of electrical utilities and final connections to hoods.
1.02 SCOPE AND CLASSIFICATION
A. This specification covers the requirements for the purchase of bench mounted laboratory fume hoods for use with remote exhaust blower systems.
B. Bench-mounted laboratory fume hoods in 4, 5, and 6-foot widths, internal depth of 21.8 inches and external depth of 32.7 inches is required. 
C. This specification sets the intent for quality, performance and appearance.
1.03 REFERENCES
A. The laboratory hoods must conform to the following regulations and standards.
1. SEFA 1, Scientific Equipment and Furniture Association , Recommended Practices for Laboratory Fume Hoods
2. SEFA 8, Recommended Practices for Laboratory Grade Metal Casework, 8.0 Cabinet Surface Finish Tests
3. NFPA 45, National Fire Protection Association,  Fire Protection for Laboratories Using Chemicals
4. ASTM E84-09C, ANSI 2.5,  NFPA 255, UL 723, UBC 8-1 (42-1), Standard Test method for Surface Burning Characteristics of Building Materials
5. ASHRAE 110-2016, American Society of Heating, Refrigerating, and Air-Conditioning Engineers, Method of Testing Performance of Laboratory Fume Hoods
6. ANSI/AIHA Z9.5, American Industrial Hygiene Association, Laboratory Ventilation
7. OSHA, Federal Register 29 CFR Part 1910, Occupational Safety & Health Administration, U.S. Department of Labor, Occupational exposures to hazardous chemicals in laboratories.
B. The laboratory fume hoods must carry the ETL listed mark for the following.
1. UL 61010-1 (formerly 3101-1), Underwriters Laboratories Inc., Electrical Equipment for Laboratory Use
2. CAN/CSA C22.2 No. 61010-1, Canadian Standards Association, Safety Requirements for Electrical Equipment for Measurement, Control and Laboratory Use
3. UL 1805, Underwriters Laboratories Inc., Standard for Laboratory Hoods and Cabinets
1.04 PERFORMANCE REQUIREMENTS
A. General Design Requirements (See Part 2 for details)
1. Fume hoods shall function as ventilated, enclosed workspaces, designed to capture, contain and exhaust fumes, vapors and particulate matter produced or generated within the enclosure.
2. Fume hood shall be factory designed to function as a [by-pass fume hood] [variable air volume fume hood].
3. Structure and Materials of construction
a. Hoods are of double-wall construction 
b. Tempered safety glass
c. Powder-coated, cold rolled steel exterior
d. Galvanized steel support members
4. Baffles
a. Baffle designed to optimize face velocity profile.
b. Moving or adjustable baffles are not acceptable
5. Sash
a. Maximum opening is 28 inches. 
b. Unobstructed viewing height is 37-1/2 inches. 
c. Hood incorporates a perforated sash handle to bleed air into the hood chamber directing fume concentrations away from the user's breathing zone. 
6. Airfoil:
a. Hoods are provided with an airfoil across the bottom of the sash area to allow airflow into the hood regardless of user's position. Airfoil shall have hinged access to a secondary spill trough area under the airfoil.   
7. Besides the exhaust blower, no additional blowers are required for specified containment. 
8. Access for maintenance is from both the front, interior, and exterior sides of the hood. 
9. Services:
a. Furnishing and delivering all service outlets, accessory fittings, electrical receptacles and switches, as listed in these specifications, equipment schedules or as shown on drawings. 
b. Plumbing fittings mounted on the fume hood superstructures shall be pre-plumbed per section 2.03. 
c. Final plumbing and electrical connections are the responsibility of those contractors fulfilling requirements of Divisions [15 and 16].
d. All electrical services are pre-wired to a single point internal junction box at the top right of the hood. 
10. Hoods without service fixtures pass through a 33 inch opening without disassembly.
B. Containment 
1. The purpose of this section is to set a standard of performance for the bidderÕs laboratory fume hood before award of contract, and may not necessarily represent the operating conditions of the hoods after installation.  Before or after award of contract, owners may require representative witness to said testing at their option, with failure to meet passing criteria as grounds for rejection of the bidder.  Test data shall be provided at no cost to the owner.
2. Evaluation of manufacturerÕs standard product shall take place in manufacturerÕs test facility meeting the following criteria.
a. Lab to be located at manufacturerÕs place of business for the testing of bench-mounted laboratory hoods in accordance with ASHRAE Standard 110.
b. Room shall accommodate hoods up to 16Õ wide, while maintaining sufficient area so that a minimum of 15 feet of clear space is available in front of and 5Õ on both sides of hoods for viewing tests.
c. The facility's ventilation system shall have adequate heating and air conditioning so that room air temperatures can be maintained within the desired ranges.
d. One hundred percent non-recirculated air to be both carbon and HEPA filtered to ensure removal of contaminants that could interfere with containment testing before entering the lab.
e. Make-up air to the test room shall be ceiling-supplied through any combination of multiple diffusers to either minimize adverse airflow, or increase it depending on test objectives.  
f. Exhaust volumes shall be computer controlled and measured via AMCA calibrated orifices and flow station at each exhaust trunk.
g. Room pressurization must be digitally monitored, and variable depending on test objectives.
h. All equipment must be properly calibrated.
i. Qualified personnel familiar with the laboratory and its operation shall be available to perform the test. 
j. Include the following instrumentation and test equipment:
1) Properly calibrated hot wire thermal anemometer capable of measuring air velocities from 10 to 600 ft/minute; correlate with computer data acquisition format to provide simultaneous readings at all points.
2) Theatrical smoke generator or other source of high volume smoke.
3) Smoke tubes or other source of localized smoke.
4) Leakmeter with traceable calibration, calibrated just before test, to indicated concentration of sulfur hexafluoride.
5) Tracer gas:  Sulfur hexafluoride supplied from a cylinder with two stage regulator.
6) Adjustable mannequin, 5' to 5'8" in height, with reasonable human proportions, clothed in a smock
7) Inclined manometer with graduations no greater than 0.2 inch of water.  
8) Ejector system:  Tracer gas ejector built to specific ASHRAE-110 requirements.  
9) Critical orifice:  Sized to provide tracer gas at four or eight liters per minute at an upstream pressure sufficient to maintain release rate.
10) Data acquisition software to include HoodProª and LabMeasureProª  from Exposure Control Technologies, Inc.
3. Hood shall be tested to ASHRAE 110 modified test method as detailed below.
4. Some fume hoods may use face velocity controls, motorized baffles, integral auxiliary make up, or supply fans.  Because all of these devices are subject to failure, containment testing shall show both operational containment and product containment with these systems off.
5. Fume hood sashes shall be placed in their full open position, at least 28Ó from the work surface, unless noted otherwise.
6. Ambient Temperature: 68 to 74 degrees F
7. Average Face Velocity: Face velocity average shall be 60 fpm, as noted below in subsection 8.d, parts 1 and 2, plus or minus 10%.
a. An imaginary grid is formed comprised of equal 12Ó by 12Ó squares, or smaller, across the face opening of the laboratory hood.  Airflow velocity readings are taken at the intersections of these grids with calibrated hot wire anemometer over a twenty second period of time.  Probes shall communicate readings to a computer data acquisition package, which will provide an average of each reading over the one-minute period and also an overall average upon completion of data acquisition.  Face velocity shall be determined by averaging readings at the hood face.  
b. Average face velocity must be achieved without exceeding the CFM noted in part C.
8. Tracer Gas Detection: Hood shall achieve a rating of 4.0AM0.00 maximum average and 4.0AM0.01 maximum spike (unless specifically otherwise noted), wherein:
a. 4.0 = tracer gas release in liters/minute, AM = as manufactured, 0.01 = tracer gas in parts per million (PPM)
b. With the ejector body 6" from the rear of the sash plane, the test shall be conducted for each ejector position noted.
1) Left position with ejector 12" from the left interior wall.
2) Center position with ejector equidistant from the sidewalls.
3) Right position with ejector 12" from the right interior wall.  
c. Install mannequin positioned in front of the hood, centered on the ejector.
d. Detector probes shall be placed 3Ó in front of the sash plane.  The test shall be conducted for each detector probe position and corresponding face velocity. 
1) Detector probe in the region of the nose and mouth of the mannequin. Test with average face velocity of 60 fpm.  
2) Detector probe in the region of the nose and mouth of the mannequin.  Test with average face velocity of 50 fpm.
e. Open tracer gas valve, and collect readings with a computer data acquisition package, which is capable of monitoring and visually recording a minimum of one reading per second for a minimal five minute time period for each position.
f. The single control rating of the fume hood shall be the results of the test position yielding the highest average levels of tracer gas in any of the six mannequin/ejector configurations.
g. With the ejector and mannequin in the center position, detector probe in the region of the nose and mouth of the mannequin, average face velocity of 60 fpm, tracer gas released, and concentration recorded, open and close the sash in a smooth motion.  Test to be repeated three times, with peak values of 0.01 PPM or less. 
h. With the mannequin removed, the periphery of the hood is traversed by the probe at 1Ó in front of the hood opening at a rate of 3 inches per second.  The hood shall have a maximum perimeter reading of 0.03 PPM or less. 
9. Flow Visualization: 
a. Test the operation of the lower air bypass airflow opening and hood periphery by introducing light smoke under the air foil, and around the perimeter of the sash opening.  If any smoke that enters the hood reverses directions and escapes from any of these locations, the hood fails this portion of the test and receives no rating.
b. Introduce smoke along both walls and the hood floor in a line parallel to the hood face and 6 inches (152 mm) back into the hood. Define air movement toward the face of the hood as reverse airflow and define lack of movement as dead air space. All smoke should be carried to the back of the hood and out.
c. Introduce a large volume of smoke at the work surface in the center of the hood, and 6Ó inside the plane of the sash.  Define air movement toward the face of the hood as reverse airflow and define lack of movement as dead air space. All smoke should be carried to the back of the hood and out.
d. All data on the above, including instrumentation and equipment, and test conditions shall be provided on a report, including the average face velocities, and a separate graph-type performance curve on all tracer gas tests for all required fume hood widths. Performance test data for a 6Õ representative hood shall be conducted by an independent testing agency and by a specific individual certified to perform such tests by the National Environmental Balancing Bureau (NEBB). 
C. Efficiencies
1. The fume hood shall maintain constant volumetric rate (+/- 5 CFM) and static pressure losses (+/- 0.01Ó H2O) across all sash positions.
2. The fume hood shall demonstrate a minimization of the volumetric rate of air (CFM) requirement at any given face velocity.  Required CFM to achieve desired face velocity shall not exceed that which is noted in the chart below.
3. The fume hood shall demonstrate a minimization of static pressure loss (inches of H2O) at any given CFM.  Static pressure loss at desired face velocity, and corresponding CFM, shall not exceed that which is noted in the chart below.


D. Noise Criterion: The hood shall have a Noise Criterion (NC) rating of less than 50; measured 36Ó in front of the hood with full open sash, at 100 fpm face velocity.  NC is a factor of sound pressure level (dB) and frequency.  
E. Illumination: Shall be a minimum average of 80 foot-candles inside the work area.  Work area is defined as the area inside the lined portion of the fume hood, from the face of baffle to sash plane, from interior left to interior right, and from the work surface to a height of 28 inches.
F. Materials of Construction: Interior and Exterior materials of construction and finishes shall meet the requirements in Part 2 of this specification.  
1.05 QUALITY ASSURANCE
A. Fume hoods shall be designed, including comprehensive engineering analysis, by a qualified, licensed Professional Engineer.
B. ManufacturerÕs Qualifications
1. ISO 9001 Certified manufacturing plant and processes.
2. Ten installations of equal or larger size and requirements.  Provide contact at each.
3. Only hood manufacturers who have had fume hoods as a principal product for 50 years are considered. 
C. Fume hoods shall be Made in America
1. 95% or more of raw material and component suppliers shall be United States based.
2. Stainless and cold rolled steel used in manufacturing shall be sourced from United States steel mills.
3. Final product must be fabricated and assembled within the United States of America.
4. Owner reserves the right to evaluate Made in America claims for compliance with the Bureau of Consumer Protection.
D. Supply all equipment in accordance with this specification. Offering a product differing in materials, construction, or performance from this specification requires written approval obtained seven days or more before the proposal deadline. 
E. The owner/architect reserves the right to reject qualified or alternate proposals and to award based on product value where such action assures the owner greater integrity of product.
F. Manufacturer's warranty against defects in material or workmanship on its fume hoods will be for 1 year from date of installation or 2 years from date of purchase, whichever is sooner, and includes replacement of parts (except lamps) and labor.
1.06 SUBMITTALS
A. Action Submittals
1. Laboratory hood specification sheets and product manuals shall be submitted by the hood manufacturer upon request, and include safe and proper operation and maintenance information.
2. Shop Drawings:  Include plans, elevations, sections, and details.
a. Indicate details for anchoring fume hoods to permanent building construction including locations of blocking and other supports.
b. Indicate locations and types of service fittings together with associated service supply connection required.
c. Indicate duct connections, electrical connections, and locations of access panels.
d. Include roughing-in information for mechanical, plumbing, and electrical connections.
e. Provide face opening, volumetric rates, and static pressure drop data.
3. Submit a document detailing the information supplied on the Hood Safety Practices Label to verify compliance to specifications.
B. Informational Submittals
1. Product Test Reports:  Showing compliance with specified performance requirements, including NEBB representative test report as defined previously.
2. Independent validation:  
a. Written verification that the laboratory fume hoods carry the ETL listed mark for the following.
1) UL 61010-1 (formerly 3101-1), Underwriters Laboratories Inc., Electrical Equipment for Laboratory Use
2) CAN/CSA C22.2 No. 61010-1, Canadian Standards Association, Safety Requirements for Electrical Equipment for Measurement, Control and Laboratory Use
3) UL 1805, Underwriters Laboratories Inc., Standard for Laboratory Hoods and Cabinets
b. Written verification from an outside testing agency confirming coating compliance to SEFA 8-2010, Recommended Practices for Laboratory Grade Metal Casework, 8.0 Cabinet Surface Finish Tests
3. Documentation of ISO 9001 Certified manufacturing plant and processes.
4. List of five installations (of equal or larger size and requirements) is available upon request.  
5. Declaration of Made in America. Owner reserves the right to evaluate Made in America claims for compliance with the Bureau of Consumer Protection.
C. Material Submittals
1. Samples for Verification: of the hood exterior wall material, interior liner and baffle material, epoxy work surface material, and color selection chips are available from the hood manufacturer upon request.
1.07 DELIVERY, STORAGE, AND HANDLING
A. Protect finished surfaces during handling and installation with protective covering of polyethylene film or another suitable material.
B. Schedule delivery of equipment so that spaces are sufficiently complete that equipment can be installed immediately following delivery.
1.08 PROJECT CONDITIONS
A. Environmental Limitations:  Do not deliver or install fume hoods until building is enclosed, wet work and utility roughing-in are complete, and HVAC system is operating and maintaining temperature and relative humidity at occupancy levels during the remainder of the construction period.

PART 2 -  PRODUCTS
2.01 MANUFACTURERS
A. Acceptable Manufacturer:  Labconco Corporation, 8811 Prospect Avenue, Kansas City, Missouri 64132
B. Basis-of-Design Product:  Labconco Protector ClassMate
2.02 MATERIALS 
A. Safety Glass on Hood Viewing Panels, Sides, Back, and Baffle 
1. Minimum thickness 1/4 inches thick tempered safety glass.  
a. Clarity and temper test to be as specified in latest edition of Glass Tempering Association, Engineering Standards Manual, Section 8.1. 
b. Surface and interior visible quality to be as specified per ASTM C 1036, Standard Specification for Flat Glass, Table 4, Quality level Q3.
B. Sheet Steel
1. Side panels, corner posts, and access plates shall be 18-gauge sheet steel.
2. Cold-rolled, commercial steel (CS) sheet, complying with ASTMÊAÊ1008/AÊ1008M.
C. Chemical Resistant Finish
1. General:  Prepare, treat, and finish welded assemblies after welding.  Prepare, treat, and finish components that are to be assembled with mechanical fasteners before assembling.  
2. Chemical and Physical Resistance of Finish System:  Finish complies with acceptance levels of cabinet surface finish tests in SEFAÊ8.  Third party validation required.  
3. Powder-coat process required.  Paint processes that release Volatile Organic Compounds (VOC) are not acceptable
4. Color for Fume Hood Finish: 
a. Glacier White

2.03 CONSTRUCTION
A. Superstructure:
1. Self-supporting, rigid structural assembly, to support inner wall consisting of fume hood liner and outer wall of sheet metal exterior.
2. Fabricated from 20 gauge or heavier gauge cold-rolled steel with epoxy-coated finish
3. Space shall accommodate fume hood wiring and plumbing components for service fixtures.
4. Access to fixture valves concealed in wall provided by exterior removable access panels, or through removable access panels on the front posts.
B. Exterior
1. Fabricate from steel sheet with component parts screwed together. 
2. Apply chemical-resistant finish to interior and exterior surfaces of component parts before assembly.
3. Side panels shall lift off without the use of tools to allow access to plumbing lines, service fittings, electrical wiring, counterbalance sash weights, and light fixtures.  Exposed fasteners or hardware, and Velcro type fasteners, are not acceptable.
4. Corner posts 
a. Pre-punched and plugged to accommodate up to 4 service fixtures per side
b. All services are accessible from the front of the hood. 
c. Aerodynamic shape
d. Accommodate two electrical duplexes per side.
e. Right hand corner post includes electrical switches and pre-cut for Airflow monitor installation.
f. Un-used penetrations shall be plugged. 
5. Top and sides of face opening to provide an aerodynamic shape to ensure smooth, even flow of air into fume hood.
6. Panel above header shall be removable without the use of tools to allow access to mechanical connection, electrical wiring, counterbalance sash weights, and light fixtures.  Exposed fasteners or hardware, and Velcro type fasteners, are not acceptable.
C. Dimensions
1. Overall exterior dimensions are as follows:
a. 4 foot nominal width: 48Ó w x 59Ó h x 31.7Ó [or 37.7Ó][or 43.7Ó]d
b. 5 foot nominal width: 60Ó w x 59Ó h x 31.7Ó [or 37.7Ó][or 43.7Ó]d
c. 6 foot nominal width: 72Ó w x 59Ó h x 31.7Ó [or 37.7Ó][or 43.7Ó]d
2. Overall interior dimensions are as follows:
a. 4 foot nominal width: 38.1Ó w x 48Ó h x 23.6Ó [or 29.6Ó] [or 35.6Ó]d
b. 5 foot nominal width: 50.1Ó w x 48Ó h x 23.6Ó [or 29.6Ó] [or 35.6Ó]d
c. 6 foot nominal width: 62.1Ó w x 48Ó h x 23.6Ó [or 29.6Ó] [or 35.6Ó]d

D. Hood Liner 
1. Secure interior glass liner components to superstructure.
2. Stainless steel fasteners shall be used on the interior ceiling for structural integrity.
3. Punch fume hood fixture panels to receive four service fittings, for use with remote controls, per side.  Provide removable plug buttons for holes not used for indicated fittings.
4. Each side wall shall include a rectangular interior access panel to provide access to the side wall of the fume hood for plumbing service access. Access panel material shall be steel with a chemical resistant finish.   
E. Hood Baffle
1. Baffle system shall be fixed, and designed to capture a wide range of gaseous densities without adjustment or moving components. 
2. Shall provide a continuous horizontal slot at the work surface. 
3. The baffle system shall be constructed with the same material as the fume hood liner.
4. The baffles shall be able to be pivoted for cleaning. The primary baffles shall be three pieces to allow removal if necessary.  
5. Moving parts or adjustment of any kind is not acceptable.
F. Exhaust Connection
1. 316 stainless steel with Chemical-Resistant Finish 
2. 12.81 inch ID to accommodate any 12 inch nominal duct without the need for a transition adapter. Hoods have one exhaust connection.  Additional components required to accommodate 12 inch nominal mechanical system are not acceptable.
3. Ducting shall go inside the duct collar to ensure condensate travels into the hood and evaporates.  Duct collars that allow duct connection over the collar are not acceptable.
G. Airfoil
1. Cold Rolled Steel [or 316 stainless steel] with Chemical-Resistant Finish.
2. Low profile, flush airfoil directs airflow across work top to rear baffle.
3. Airfoil shall have 1-1/4 inch deep spill trough and shall require no cabinet overhang.  
4. Must have 3 rows of perforations to allow the air to bypass underneath and through the foil and sweep across the work surface to prevent any back flow of fumes escaping from the front of the hood opening. 
5. Foil must extend back under the sash to prevent closure of the lower by-pass opening when the sash is in the fully closed position, directly on top of the airfoil. 
H. Sash Assembly
1. Glass: Fully tempered safety glass [or glaze with laminated safety glass] with unobstructed, side-to-side view of fume hood interior and service fixture connections.
2. Dimensions: The full sash opening height is 28 inches, the total unobstructed viewing height is 37-1/2 inches measured from the work surface. 
3. Sash Tracks: Steel with Chemical Resistant Finish. Shall include bump stops for opening and closing.
4. Sash Handle: extruded aluminum with Chemical Resistant Finish.  Sash handle includes a perforated air passage directly atop the handle to bleed air into the hood chamber and direct chemical fumes away from the user's breathing zone. The handle is ergonomic in design and is easy to grasp when operating
5. Sash guides:  Corrosion resistant extruded poly-vinyl chloride.
6. Sash System [Select One]
a. Vertical Sash (Chain and Sprocket)
1) Hoods have a single vertical sash counterbalanced by a single weight with a 5 degree angle.
2) Sash and weight to be connected via #35 chains.  
3) Rear sprockets shall be connected via timing shaft to prevent sash tilting and permit one finger operation at any point along full width sash handle.  Maximum 7 pounds pull required to raise or lower sash throughout its full length of travel.  
4) Design system to hold sash at any position without creep and to prevent sash drop in the event of chain failure.  
b. Vertical Sash (Auto Return)
1) Hoods have a single vertical sash counterbalanced by a single weight with a 5 degree angle.
2) Sash and weight to be connected via #35 chains.  
3) Rear sprockets shall be connected via timing shaft to prevent sash tilting and permit one finger operation at any point along full width sash handle.  
4) Design system to auto return to 18Ó above the work surface using spring-loaded mechanism.  
c. Combination Horizontal Sliding/Vertical Rising (Chain and Sprocket)
1) Hoods shall have 4 horizontal sliding sash panes counterbalanced by a single weight with a 5 degree angle and shall have a stationary 9-1/2 inch view panel.
2) Sash and weight to be connected via #35 chains.  
3) Rear sprockets shall be connected via timing shaft to prevent sash tilting and permit one finger operation at any point along full width sash handle.  Maximum 7 pounds pull required to raise or lower sash throughout its full length of travel.  
4) Design system to hold sash at any position without creep and to prevent sash drop in the event of chain failure.  
5) Include a defeatable, and automatically resetting sash stop positioned for a 14 inch sash height.

I. Electrical Components[Delete this section if hoods are to be EP rated]
1. Lighting 
a. Provide UL Listed, high-efficiency, quick-start, LED lighting systems, including bulbs.
1) 4 Foot Hoods - 2 each, 3-foot 11-watt LED lamps
2) 5 Foot Hoods - 2 each, 4-foot 17-watt LED lamps
3) 6 Foot Hoods - 2 each, 4-foot 17-watt LED lamps 
b. Vapor-Proof: all electrical components shall be outside of the contaminated air space.  Lighting shall be located behind a laminated safety glass shield, sealed to the top of the hood liner. 
c. The LED light assemblies shall be serviceable from outside the fume hood cavity, without the use of tools.  
d. Light switch to be included on the lower right corner post, at heights compliant with the Americans with Disabilities Act (ADA).
2. Blower Switch [Pick one]
a. Hoods shall be provided with blower switch, on the lower right corner post, at heights compliant with the Americans with Disabilities Act (ADA).
b. Hoods shall be provided without a blower switch, as they will share a single mechanical system with other hoods.
3. Electrical Receptacles
a. The hoods shall accommodate up to two (one per corner post) electrical receptacles as indicated in schedule or drawings. Options to include:
1) 115 volt, 60 Hz, three-wire polarized and grounded electrical duplex 
2) 115 volt, 60 Hz, three-wire polarized and grounded electrical duplex, with Ground Fault Circuit Interruption (GFCI) 
3) 230 volt, 60 Hz, three-wire polarized and grounded electrical duplex
b. Each 115v electrical duplex shall be rated at 20 Amperes, each 230v electrical duplex shall be rated at 10 Amperes. 
c. Cover plates shall be acid resistant thermoplastic.
4. Wiring
a. Every electrical component shall be individually wired to a single point internal field wiring box (including individual duplexes/receptacles).
b. Field wiring box to be 7Ó x 4Ó x 2.5Ó, grounded, and have (12) 7/8Ó diameter knock out penetrations.
c. Final wiring and circuit dedication is to be by others. 
d. Each receptacle circuit shall accommodate being wired to a dedicated building circuit rated at 20A, or the receptacles ganged together on a building circuit with the total load not exceeding 20 Amperes.
5. Fume hood to have third party validation of compliance to UL 1805 and UL 61010-1 by a Nationally Recognized Testing Laboratory (NRTL)
J. Electrical Requirements [Delete this section if hoods are not EP Rated.  Working with a flammable chemical is not justification for the use of an EP fume hood. The interior of chemical fume hoods are void of electrical components; the lighting is isolated from the interior via a piece of thick safety glass, the electrical duplexes and switches are positioned on the exterior, all the wiring is contained within the sidewall of the hood, and even the thermister or hot wire from the airflow monitor is in an isolated airstream. From the factory, there is no spark potential on the inside of a standard chemical fume hood.
      The National Electrical Code (NEC), or National Fire Protection Association (NFPA) 70, classifies rooms with potentially explosive or flammable atmospheres as either Class I, II, or III and Division 1 or 2 within these Class options. Class I locations are where flammable gasses or vapors may be present in the air in quantities sufficient to produce explosive or ignitable mixtures. Class II and III locations are rooms with the presence of combustible dust and fibers, respectively, and are not typical of the atmosphere in a laboratory environment.
      If a fume hood is located in a space with any of these electrical classifications, the hood should be EP rated, regardless of the kind of work going on inside the hood. This is because labs with a potentially flammable atmosphere must be void of spark potential; this includes the electrical components outside of the fume hoodÕs airstream.]
1. Hoods to be EP rated, and appropriate for use in an electrically classified space per NFPA 70
2. Lighting: UL listed, EP rated incandescent light fixtures
3. Wiring
a. No wiring or switches are provided.  
b. Hoods to be field wired to meet local codes for electrical equipment in a classified space having a potentially explosive atmosphere.
K. By-Pass Opening [Pick One]
1. The size of the by-pass opening is controlled by sash position for use with a constant volume mechanical system.  The hood shall not have a change in static pressure or exhaust volume across all sash positions.
2. Shall offer a significant restriction to the by-pass opening to allow the use of a VAV mechanical system. 
L. Hood Safety Practices Label:	Corrosion resistant plate attached to the corner post of the fume hood with the following Hood Safety Practices:
1. For use with substances that produce hazardous levels of airborne chemicals: gas, fumes, vapors, dust
2. Do not put your head in the hood.
3. Minimize drafts and sudden movements in front of the hood.
4. Work a minimum of six inches inside the hood.
5. Elevate equipment above the work surface.
6. Keep sill and baffle unobstructed.
7. Do not use the hood for storage.
8. Adjust the sash to smallest opening possible when in use.
9. Close sash when unattended.
10. Do not remove any of the hood components.
11. Do not place flammable solvents near heat, flame or sparks.
12. Do not evaporate large amounts of flammable liquids.
13. Wipe up spills immediately.
14. Routinely validate airflow.
15. If the ventilation system malfunctions, or airflow alarm indicates unsafe condition, close sash and discontinue hood operation immediately-call for help.
16. Do not use with Biohazards and Perchloric Acid
M. Fume Hood Accessories [Specification writer to select applicable items]
1. Service Fixtures: Color-coded hose nozzle outlets and valves mounted inside the fume hood and controlled from the exterior with color-coded index handles
a. The hoods are equipped without service fixtures or will be provided with a total of up to 8 service fixtures as indicated in schedule. 
b. Hose connectors located inside the fume hood cavity are chemically-resistant, glass-filled polypropylene with 6 serrations. 
c. ? inch service lines shall be factory installed from valve to outlet
1) Copper tubing unless otherwise noted
2) Brass service lines for gas
3) Stainless steel service lines for Deionized Water
4) Connections shall be made with quick-connect compression fittings on the inlet and outlet of the valve body, soldered and brazed connections not easily disassembled are not acceptable.
5) Inlet tubing not included [or services pre-piped to the top of the hood][or services include a coil of tubing to be routed below the hood at time of installation]
d. Valves
1) Extruded brass valve and rotating seat, TFE-coated silicone bronze stem and TFE packing. 
2) Fixture handles are plastic and color coded as well as labeled for the designated type of service.
3) Fixtures are rated at maximum pressure of 200 psi.
4) Coefficient of flow for the valve, Cv=0.43. 
5) Valves are front loaded, located on the fume hood corner post for remote use, and include:
a) Hot and cold tap water (flow rate 3.5 GPM or 13.25 LPM at 67 psi at full open
b) Natural gas (theoretical flow rate of 71CFM at 100 psi, provides 1095 BTU/Sec at a density of .667 Lbs/CU. FT.)
c) Air (theoretical flow rate of 59 CFM at 100psi)
d) Vacuum (theoretical flow rate of 6 CFM at 10 psi)
e) Nitrogen
f) Argon 
g) Steam
h) Oxygen (include oxygen compatible lubricant)
i) Deionized/Distilled water (Nickel plated and stainless steel components)
2. Tissue Screen: Provide epoxy-coated, stainless-steel screen located directly below the exhaust collar to prevent paper from being drawn into the exhaust.
3. Rear Finish Panel:  Shall be the same materials and coating as the hood exterior.
4. Ceiling Enclosure Panels: 
a. Provide filler panels matching fume hood exterior to enclose space above fume hoods at front and sides of fume hoods and extending from tops of fume hoods to ceiling. 
b. Exposed fasteners are not acceptable.
c. Height adjustment as specified in the schedule.
5. Distillation Grid: Include stainless steel rods and connectors.
6. Fire Suppression System: An ABC dry powder fire suppression system, with 165 degree Fahrenheit fusible link, shall be factory supplied and prepped, and field installed through the ceiling of the fume hood.
7. Face Velocity Monitor/Alarm [Select one]
a. Shall not be included on EP rated hoods
b. Digital Airflow Monitor
1) Provide audible and visual alarm in the event of an unsafe face velocity.
2) Alarm must sit flush with the fume hood corner post.
3) Based on a thermally compensated thermistor in the alarm module, and air passing through a separate airstream into the hood interior.
4) Velocity shall be displayed digitally on the user facing LCD in fpm or m/s.
5) LED lights display red for alarm, yellow for caution, and green for normal operation.
6) Must include external alarm and night setback functions. 
7) Alarm mute shall be accessible from the front of the monitor; visual alarm must remain activated until alarm condition is corrected.
8) UL Listed electrical components
9) Calibration shall be through a menu driven step by step procedure. 
10) Calibration is the responsibility of the owner, following a complete balancing of the mechanical system, and concurrently with As-Installed testing.
c. Audio/Visual Airflow Monitor
1) Provide audible and visual alarm in the event of an unsafe face velocity.
2) Alarm must sit flush with the fume hood corner post.
3) Based on a thermally compensated thermistor in the alarm module, and air passing through a separate airstream into the hood interior.
4) LED lights display red for alarm and green for normal operation.
5) Must include external alarm and night setback functions. 
6) Alarm mute shall be accessible from the front of the monitor; visual alarm must remain activated until alarm condition is corrected.
7) UL Listed electrical components
8) Calibration shall be through a front located potentiometer. 
9) Calibration is the responsibility of the owner, following a complete balancing of the mechanical system, and concurrently with As-Installed testing.
d. Variable Air Volume (VAV) Prepared
1) Fume hoods shall come factory prepared with the proper cutouts and brackets to field mount specified [Note Section, or VAV controller make and model] VAV controller and sash position sensor.  Airflow monitor by VAV supplier.
N. Work Surface
1. 1-1/4 inch thick, molded from solid modified epoxy resin, with smooth, non-specular, black finish.
2. 1/4 inch radius front edge for optimal fume hood performance.
3. 1/4 inch dished area to match the fume hood interior work space and form a water tight pan for spill containment.
4. Include a 1-1/4 inch by 20.4 inch slot on each side for service pass-through and piping.  Hole to be covered by hood superstructure upon installation.
5. Physical Properties:
a. Flexural Strength:  Not less than 10,000 psi (70 MPa).
b. Modulus of Elasticity:  Not less than 2,000,000 psi (1400 MPa).
c. Hardness (RockwellÊM):  Not less than 100.
d. Water Absorption (24 Hours):  Not more than 0.02 percent.
e. Heat Distortion Point:  Not less than 260 degÊF (127 degÊC).
f. Flame-Spread Index:  25 or less per ASTMÊEÊ84.
6. Cupsink
a. 3 x 6Ó dimension, polypropylene construction
b. Provide with strainers and tailpieces, NPSÊ1-1/2 (DNÊ40)
c. To sit flush with dished area of work surface
d. Cupsink(s) to be located [Select all that apply]
1) Left rear
2) Left side
3) Right rear
4) Right side
O. Supporting Base Cabinets
1. Base cabinets shall be in depths of 22", widths, quantities, and types called out in the equipment schedule [or drawings], and meet the requirements of this specification.
2. Construction requirements for all cabinets
a. Exterior construction is 18 gauge (or heavier) cold rolled sheet steel with Chemical Resistant Finish.
b. Hinges are 10 gauge (or heavier) plate with self-clinching pilot pin. Knuckle, bullet, or piano type hinges are not accepted.
c. The rear panel will feature a 12" x 8" removable plumbing access panel. 
d. Units 24" wide or less have only one door.
e. Each cabinet includes four leveling feet.  
f. Capable of supporting up to 800 pounds. 
g. A 14" filler panel is required to increases the cabinet depth to 36". 
3. Standard Storage
a. Overall exterior dimensions:
1) 48"	48" w x 22" d x 35.5"-36.75" 
2) 36"	36" w x 22" d x 35.5"-36.75" 
3) 30"	30" w x 22" d x 35.5"-36.75" 
4) 24"	24" w x 22" d x 35.5"-36.75" h or 31.5"-32.75" for ADA cabinet
5) 18"	18" w x 22" d x 35.5"-36.75" h or 31.5"-32.75" for ADA cabinet
6) 12"	12" w x 22" d x 35.5"-36.75" h or 31.5"-32.75" for ADA cabinet
b. Flush pull handles are ABS, low gloss black.
4. Acid Storage 
a. Overall exterior dimensions:
1) 48"	48" w x 22" d x 35.5"-36.75" 
2) 36"	36" w x 22" d x 35.5"-36.75" 
3) 30"	30" w x 22" d x 35.5"-36.75" 
4) 24"	24" w x 22" d x 35.5"-36.75" h or 31.5"-32.75" for ADA cabinet
5) 18"	18" w x 22" d x 35.5"-36.75" h or 31.5"-32.75" for ADA cabinet
b. Completely lined with a polyethylene corrosion resistant liner. The liner is 3/16" thick, with a vacuum formed PVC liner pan at the bottom to contain spills. Each door has a 3/16" sheet polyethylene liner. 
c. The cabinet is labeled: "ACID".
d. Flush pull handles are ABS, low gloss black. 
e. Each cabinet is vented into the fume hood with a 11/2" vent pipe. It should provide a positive airflow directly into the fume hood exhaust system. 
f. Supply an epoxy coated steel shelf with PVC liner pan if indicated in the schedule.
g. Acid cabinets with louvers are not acceptable
5. Solvent Storage 
a. Overall exterior dimensions:
1) 48"	48" w x 22" d x 35.5"-36.75" 
2) 36"	36" w x 22" d x 35.5"-36.75" 
3) 30"	30" w x 22" d x 35.5"-36.75" 
4) 24"	24" w x 22" d x 35.5"-36.75" h or 31.5"-32.75" for ADA cabinet
b. Solvent storage cabinets are specifically designed for the storage of flammable and combustible liquids. 
c. Solvent Storage Cabinet must be compliant with NFPA 30 ÒFlammability and Combustible Liquids Code.Ó
d. Cabinets 30" wide and greater shall be tested and approved by Factory Mutual to meet Factory Mutual Approval Standard 6050.  
e. The bottoms, top, sides, and doors are fabricated of 18 gauge steel and are all double panel construction with a 11/2" air space between panels. 
f. All joints are welded or screwed to provide a rigid enclosure. A 2" deep liquid tight pan that covers the entire bottom of the cabinet is furnished to contain liquid leaks and spills. 
g. A full-depth, 18 gauge steel, adjustable shelf is also provided. Shelves are sealed leak tight.
h. Two diametrically opposed flame arrestor vents with spark screens are provided in the back of the cabinet, as well as a grounding screw. 
i. The cabinet has an interior finish same as the exterior. 
j. The cabinet is labeled: "FLAMMABLE  KEEP FIRE AWAY". 
k. The right hand door shall have a three point latching device.
l. Door handles include a key lock. Solvent storage handles are locking lever handles with bright chrome finish.
m. If noted on the schedule, self-closing/self-latching models shall be provided with a fusiblelink feature to ensure the doors will close if the temperature outside the cabinet exceeds 165 degrees Fahrenheit. The doors are synchronized so that both doors will fully close. 

























PART 3 -  EXECUTION
3.01 EXAMINATION
A. Examine areas, with installer present, for compliance with requirements for installation tolerances and other conditions affecting performance of fume hoods.
B. Coordinate with other trades for the proper and correct installation of plumbing and electrical rough-in and for rough opening dimensions required for the installation of the hood.
C. Proceed with installation only after unsatisfactory conditions have been corrected.
3.02 INSTALLATION
A. General:  Install fume hoods according to shop drawings and manufacturer's written instructions.  
B. Install level, plumb, and true; shim as required, using concealed shims, and securely anchor to building and adjacent laboratory casework.  
C. Securely attach access panels, but provide for easy removal and secure reattachment.  Where fume hoods abut other finished work, apply filler strips and scribe for accurate fit, with fasteners concealed where practical.
D. Neighboring splash blocks shall not be attached directly to the hood.
E. Install according to standards required by authority having jurisdiction.
F. Sequence installations to ensure utility connections are achieved in an orderly and expeditious manner.
G. Touch up minor damaged surfaces caused by installation. Replace damaged components as directed by Architect.
3.03 FIELD QUALITY CONTROL
A. NFPAÊ45 requires that fume hoods be field tested when installed.  
B. Field test installed fume hoods according to ASHRAEÊ110 to verify compliance with performance requirements.
1. Adjust fume hoods, hood exhaust fans, building's HVAC system, and make other corrections until tested hoods perform as specified in fume hood schedule.
2. After making corrections, retest fume hoods that failed to perform as specified.
3.04 ADJUSTING AND CLEANING
A. Adjust moving parts for smooth, near silent, accurate sash operation with one hand.  Adjust sashes for uniform contact of rubber bumpers.  Verify that counterbalances operate without interference.
B. Clean finished surfaces, including both sides of glass; touch up as required; and remove or refinish damaged or soiled areas to match original factory finish, as approved by Architect.
C. Clean adjacent construction and surfaces that may have been soiled in the course of installation of work in this section.
D. Provide all necessary protective measures to prevent exposure of equipment and surfaces from exposure to other construction activity.
E. Advise contractor of procedures and precautions for protection of material and installed equipment and casework from damage by work of other trades.


	Labconco Protector¨ ClassMate¨
High Performance Fume Hood Specification

LABORATORY FUME HOODS
115313 - 6