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The Lennox X7751 Filter Replacement 4-Pack fits any furnace or air conditioner that requires a 20x25x5 filter. This Healthy Climate filter has a MERV rating of 11, and comes 4 in a pack.
The Lennox X7751 Filter Replacement 4-Pack specifications:
This Lennox filter has 98% efficient filtration media, and is up to twenty times more effective than ordinary fiberglass filters.