Description
Actual Dimensions: 19.75 x 19.88 x 4.38. Accumulair brand: 20x20x5 Honeywell 203721 substitute whole house air filters, exactly built to substitute for the original manufacturer Honeywell 203721 filters. Completely box-formed so no forming or combs needed. MERV rated to ASHRAE 52.2 test classifications establishing function to the level of the OEM Honeywell 203721 air filter. Photo: Sample filter picture shown is not true to size and is displayed for style purposes only. Company names and Honeywell 203721 identifier shown for air filter style identification purposes.