Actual Size: 16.63 x 26 x 4.13. Accumulair brand: 17x26x4 Lennox HCFPCO12-10 substitute whole house air filters, specifically engineered to replace the OEM Lennox HCFPCO12-10 filters. Fully constructed with no assembly or combs needed. MERV graded to ASHRAE classifications assuring filtration equal to the OEM Lennox HCFPCO12-10 air filters. Photo: Example filter picture shown is not true to size and is displayed for style purposes only. Brand names and Lennox HCFPCO12-10 P/N are shown for filter replacement identification.
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