This specification covered throw-away, flat panel-type filter units for use in air conditioning, heating, and ventilating systems. This specification also included panel-type filters with pleated media.

Formerly under the jurisdiction of Committee D22 on Air Quality, this specification was withdrawn in April 2012 due to its limited use by industry.

This specification covers throw-away, flat panel-type filter units for use in air conditioning, heating, and ventilating systems. This specification also includes panel-type filters with pleated media. The filters are furnished in two types as follows: type I - throw-away frames and media, and type II - permanent frames with replaceable media. The filters are furnished in three grades as follows: grade A - standard dust-holding capacity, grade B - high dust-holding capacity, and grade C - high resistance. The adhesive oil, filter initial resistance, filter average arrestance, and filter dust holding capacity conform to the requirements specified.

1.1 This specification covers throw-away, flat panel-type filter units for use in air conditioning, heating, and ventilating systems. This specification also includes panel-type filters with pleated media.

1.2 The values stated in inch-pound units are to be regarded as the standard.