A-A-1419 Filter Element, Air Conditioning (Viscous-Impingement And Dry Types, Replaceable) (Replaced By Ansi/Ashrea 52.1 And Ul900)This commercial item description covers standard dust-holding capacity, flat panel-type air-conditioning filters designed for arresting particulate matter in heating and ventilation systems in which the face valocity of the air stream approximately 300 feet per minute (fpm).

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A-A-1419D

3. SALIENT CHARACTERISTICS

3.1 Description. The filter shall be of the flat panel-type designed and fabricated for disposal when, because of accumulated dust loading, the dust-load limit is reached. The filter media shall be dry or adhesive-coated in accordance with the manufacturer’s standard practice.

3.2 First article. When specified (see 6.1), at the beginning of each contract period the contractor shall furnish samples in accordance with paragraph 4.3.1. The approval of the first article sample authorizes the commencement of shipment but does not relieve the supplier of continued responsibility for compliance with all applicable provisions of this commercial item description. In the event the source of filter media changes, first article samples must be resubmitted.

3.3 Fire and casuality hazards. Filters shall meet the fire-resistant requirements of UL 900. Filters shall be UL class 2 unless UL class 1 in specified by purchaser (see 6.1). Adhesive coatings used on the filter media shall have a flash point of not less than 325 degrees Fahrenheit when tested in accordance with ASTM D 92.

3.3.1 Certification. prior to the approval of the sample filter furnished for first article inspection, if specified, or prior to the first shipment, if first article is not required, the contractor shall submit evidence satisfactory to the contracting officer or his authorized representative that the filters to be furnished under this commercial item description meet the UL standard cited in 3.3. Acceptable evidence that filters are in accordance with UL requirements will be the official UL listing mark or a certified test report from a laboratory acceptable to the Government indicating that the filter has been tested and conforms to the requirements for class 1 or class 2 filters (as applicable). Acceptable evidence that the adhesive coating meets the specified requirements will be a certified test report indicating that the adhesive has been tested in accordance with ASTM D 92 and has a flash point not less than the value specified in 3.3.

3.4 Performance. Filter performance shall be in accordance with the requirements of table I applicable to the thickness of filters being furnished. Performance shall be established on the basis of ASHRAE Standard 52.

3.4.1 Initial resistance. The initial resistance for clean filters shall not exceed the applicable values specified in table I when the filter is operated at face velocity of 300 fpm.

3.4.2 Final resistance. Maximum final resistance for filters with 1-inch thickness shall be 0.5 inch water gage (wg); maximum final resistance for filters with 2-inch thickness shall be 0.5-inch-wg.