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

4.5.1 Quality conformance inspection. The sample filters shall be examined for compliance with the requirements specified in section 3 and table II of this commercial item description. This element of inspection shall encompass all visual examinations and dimensional measurements. Noncompliance with any specified requirement shall constitute a defect. Tolerances limits specified are absolute limits as defined in ASTM E 29.

Table II

Defects

a. More than one 3-inch section of media or retaining screen not secured to frame.

b. More than three 1-inch sections of media or retaining screen not secured to frame.

c. More than one corner of media retaining screen not secured to frame.

d. Any portion of retaining screen or media extending outside of frame channel.

e. More than one corner of frame not secured.

f. Frame corners more than 92 degrees or less than 88 degrees.

g. Frame edges more than 3/16-inch from parallel.

h. Outside corner of frame misaligned more than 1/8-inch.

4.6 Standard compliance. The contractor shall make available to the contracting officer or his authorized representative evidence of compliance with the applicable standards cited in section 3.

4.7 Tests (first article only). The filter unit shall be tested as specified. Failure to pass any test shall be cause for rejection.

4.7.1 Average arrestance. Determination of average arrestance shall be made in accordance with ASHRAE Standard 52 for conformance with 3.4.3.

4.7.2 Initial resistance. The initial resistance of the clean filter shall be established prior to determination of the average arrestance of the sample filter.

4.7.3 Dust holding capacity. The dust holding capacity shall be reported in accordance with ASHRAE Standard 52 for conformance with 3.4.4.

4.7.4 Softening point. The softening point of adhesive used shall be reported in accordance with ASTM E 28.