Description
Actual size is 19.75 x 19.88 x 4.38. Accumulair brand: 20x20x5 Honeywell 203721 compatible whole house filters, exactly built to replace original manufacturer Honeywell 203721 filters. Fully built so no assembly or combs required. MERV rated to ASHRAE 52.2 test specifications establishing particulate capture to the level of the original manufacturer Honeywell 203721 filters. Notice: Example filter picture as shown is not the actual dimensions and is shown for construction only. Brand names and Honeywell 203721 part numbers used for air filter style identification purposes.