Product details:

Efficiency ratings are based on American Society of Heating, Refrigerating and Air-Conditioning Engineers Standard 52.2 1999. Efficiency ranges are defined for small particles, E1=0.3 to 1.0 microns; medium particles, E2=1.0 to 3.0 microns; and large particles, E3=3.0 to 10.0 microns. - Dimensions (in.)20 in. x 12 1/2 in. - Dimensions (mm)508 mm x 318 mm - Efficiency Standard - Efficiency ranges are defined for small particles, E1=0.3 to 1.0 microns; medium particles, E2=1.0 to 3.0 microns; and large particles, E3=3.0 to 10.0 microns. - Fractional Efficiency - E1=25%, E2=62%, E3=85%Minimum Efficiency Reporting Value (Media Filters Only)MERV 10Static Pressure Drop (in. w.c.) 0.23 at 500 FPMType of Air Cleaner - Media Air Cleaner