23 38 00 VENTILATION HOODS
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Aug 01, 2017
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.01 Fume Hood Exhaust Systems
- All systems shall have an adequate supply of make-up air tempered to room temperature. Auxiliary air hoods shall not be used. Total make-up air quantity shall not exceed that required to maintain the specified pressure relationship for the space.
- Exhaust fans serving fume hoods shall be located at the discharge end of the system. For additional information see Division 11 53 13 - Laboratory Fume Hoods.
- Exhaust fans shall discharge a sufficient height above the roof level to provide safe discharge and dilution of hazardous chemicals. System design shall meet ANSI/AIHA Z9.5.
- Duct systems and fans serving hoods used with combustible materials shall be of spark-proof construction.
- Use Type 316 stainless steel (welded), FRP or PVC. Suitability of duct material shall be verified with the University.
- Hoods, fans, and discharges shall be tagged for type of service and location of hood and fan. Fume hoods shall be tagged to match serving fan tag.
- Exhaust fans and ductwork handling toxic fumes and/or radioisotopes shall have a self-adhering CAUTION sticker attached.
- Exhaust stacks shall be designed according to the latest edition of the ASHRAE Fundamentals Handbook, Airflow Around Buildings.
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