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Description / Abstract:
These requirements cover tests to determine the amount of smoke
generated and the combustibility of air filter units of both
washable and throwaway types used for removal of dust and other
airborne particles from air circulated mechanically in equipment
and systems installed in accordance with the Standards for
Installation of Air Conditioning and Ventilating Systems, NFPA 90A
(Other Than Residence Type), Installation of Warm Air Heating and
Air Conditioning Systems, NFPA 90B (Residence Type), the
International Mechanical Code, the International Fire Code, and the
Uniform Mechanical Code. These requirements also cover media
intended for assembly into air filter units.
Since the smoke generation of an air filter unit, as well as its combustibility, depends upon the nature and quantity of the material collected by the filter, the test requirements of this standard, for classification purposes, apply only to air filter units in a clean condition. Consequently, when filters are susceptible to the accumulation of combustible deposits, it is intended that maintenance and inspection practices should be followed as proposed in Appendix B of NFPA 90A.
Since the smoke generation of an air filter unit, as well as its combustibility, depends upon the nature and quantity of the material collected by the filter, the test requirements of this standard, for classification purposes, apply only to air filter units in a clean condition. Consequently, when filters are susceptible to the accumulation of combustible deposits, it is intended that maintenance and inspection practices should be followed as proposed in Appendix B of NFPA 90A.