A replaceable device designed to remove dust, pollen or other foreign matter from the air passing through it. The removal of particles is accomplished by porous fibrous or shredded material (metallic or nonmetallic) which is loosely woven or matted and confined in a frame or retained between perforated sheets of firmer material. It is designed to fit into air conditioners, ventilation systems, hot air furnaces, and electrical and electronic cabinets or housings. It may have facilities for radio frequency/electromagnetic interference shielding. The filter may be cleaned by the use of compressed air, blown through the filter element, or by using water and a suitable detergent for cleaning purposes which would extend the life of the filter.
Dept. of the Army 
Dept. of the Air Force 
Dept. of the Navy 
Federal Aviation Administration Classification: Parts, nesoi, of air conditioning machines
NSN 5930-01-006-8808
NSN 5990-01-213-6319
NSN 5996-01-073-6860
NSN 5965-01-142-8044
NSN 5925-01-657-7159
NSN 5930-01-370-6424
NSN 6130-00-050-0569
NSN 6105-01-039-0396
NSN 5930-01-430-0144
NSN 4140-00-376-5712
NSN 6320-01-612-7035
NSN 6685-01-221-7678