Specifications include, but are not limited to: Pleated Panel Filters Filters of the size, air flow capacity and nominal efficiency shall meet the following rated performance specifications based on the ASHRAE 52.1-92 test method. Performance tolerance specified in Section 7.4 of the Air-Conditioning and Refrigeration Institute (ARI) Standard 850-93 shall apply to the performance ratings. All testing is to be conducted on filters with a nominal 24 X 24 face dimension. Nominal Size (width x height x depth) 24 x 24 x 2 Rated air flow capacity (CFM) 2000 Final Resistance (in W. G.) 1.0 Rated Initial resistance (in W. G.) .24 Rated Average Arrestance 90.5 Rated Average Atmospheric Dust Spot Efficiency 22.7 Gross Media Area (Sq. Ft.) 12 The filters shall be approved and Listed by Underwriters Laboratories, Inc., Class 2 when tested according to U. L. Standard 900 and CAN 4-S111.
