Lennox part # X0445, X4560 and X5424 Box-Type filter Nominal size 20" x 25" x 6" (Actual size 19 3/4" x 24 1/4" x 6 3/8") Fits Lennox and Healthy Climate model #PMAC20-C. Pre-applied gasketing on the assembled filter prevents air by-pass. High-efficiency filter media collects small dust particles before they can collect on your coils. Superior frame strength utilizing double wall construction and die cut fingers. No assembly required...no combs needed...filter just slides right in! Pre-assembled filter for easy installation! What is MERV Note: Please verify cabinet dimensions as not all PMAC20-C cabinets will fit this filter. If you are unsure, please use accordion filter above.
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