Actual Dimensions: 20.75 x 20.63 x 5. Accumulair brand: 20x21x5 Emerson F8110321 compatible whole house filters, specifically engineered to be an alternative to the original brand Emerson F8110321 air filters. Fully built - no forming or combs needed. MERV graded to ASHRAE 52.2 test specifications establishing particulate capture as good or better than the OEM Emerson F8110321 air filter. Photo: The sample filter image as displayed is not true to size and is displayed for design purposes. Trade names and Emerson F8110321 P/N used for air filter style purposes.
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