Actual size 20 1/8 x 26 x 3.
Pre-applied gasketing on the assembled filter prevents air by-pass.
98% efficient filtration media.
Fits Lennoxreg; model number PCO-20U Lennoxreg; part number X1,184 No assembly required.no combs needed.filter just slides right in! MERV 12 filters have the same airflow as the MERV 11! This is an aftermarket filter.
(2) Air Filters
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