Actual dimensions are 20 x 25.88 x 4.88. Accumulair brand: 20x26x5 Lennox X0587 replacement whole house air filters, specifically built to be an alternative to the name brand Lennox X0587 air filters. Completely constructed - no forming or combs required. MERV graded to ASHRAE specifications assuring filtration as good or better than the original manufacturer Lennox X0587 air filters. Photo: Example air filter pic shown is not to scale and is there to show style purposes. Trade names and Lennox X0587 part numbers shown for filter substitution identification use.
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