Description
Actual dimensions are 20.75 x 20.63 x 5. Accumulair brand, 20x21x5 Electro-Air F825-0337 substitute whole house air filters, exactly engineered to replace the original manufacturer Electro-Air F825-0337 air filters. Fully built with no forming or combs required. MERV classified to ASHRAE 52.2 test specifications assuring particulate filtration as good or better than the original brand Electro-Air F825-0337 filters. Photo: Sample air filter pic as shown is not true to size and is there to show design only. Name brands and Electro-Air F825-0337 P/N are shown for air filter style identification only.