These requirements apply to laboratory hoods and cabinets
intended to provide an enclosed countertop work area with exhaust
for containment and removal of vapors, mists, gases, and
particulate matter from the work area.
These requirements do not cover ductless hoods (i.e., hoods that
recirculate air back to room environment after filtering) or
These products are investigated for fire, electrical and
mechanical risk of injuries only. A limited number of tests are
conducted for minimal air flow capability. It remains for the user
to determine that the hood performance, as confirmed by the
requirements in this standard, meets the needs of the user. These
needs depend on several factors, including installation with proper
exhaust equipment, location within the room, the type of material
being handled and the method in which the material is being
handled. Also, suitability for use with perchloric acid or
radiological materials is not investigated.
Requirements for the installation of laboratory hoods are
included in the Standard for Fire Protection for Laboratories Using
Chemicals, NFPA 45 and in the Method of Testing Performance of
Laboratory Fume Hoods, ASHRAE 110.
Requirements for the installation of piped gas systems are
contained in the following standards:
a) National Fuel Gas Code, NFPA 54,
b) Liquefied Petroleum Gas Code, NFPA 58,
c) Gaseous Hydrogen Systems at Consumer Sites, NFPA 50A,
d) Design and Installation of Oxygen-Fuel Gas Systems for
Welding, Cutting, and Allied Processes, NFPA 51.
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