Actual dimensions are 19.88 x 24.88 x 4.38. Accumulair brand, 20x25x5 Lennox X5426 replacement whole house filters, specifically designed to replace original manufacturer Lennox X5426 air filters. Fully assembled with no forming or combs required. MERV classified to ASHRAE 52.2 test grades assuring particle capture as good or better than the original brand Lennox X5426 filter. Notice: Sample air filter pic as shown is not to scale and is shown for design purposes only. Trade names and Lennox X5426 P/N used for filter substitution identification use.
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