Actual Size: 19.75 x 20.75 x 4.88. Accumulair brand, 20x20x5 Ultravation 91-028 substitute whole house filters, specifically designed to substitute for the original brand Ultravation 91-028 air filters. Completely constructed so no assembly or combs needed. MERV graded to ASHRAE specifications establishing particulate filtration equal to the original manufacturer Ultravation 91-028 filter. Notice: The sample air filter pic displayed is not true to size and is included to show style purposes only. Name brands and Ultravation 91-028 part numbers are shown for air filter replacement identification purposes only.
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