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12x24x2, Furnace Filter
BestAir® Pro 2″ Series 12X24 MERV 8
BA2-1224-8 | BestAir® 12 x 24 x 2, Air Cleaning Furnace Filter, MERV 8, Removes Allergens & Contaminants, For 2″ HVAC Pleated Filter
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20x25x6, Furnace Filter
SpaceGard 20x25x6
A201-SGM-11R | BestAir® 20 x 25 x 6, Air Cleaning Furnace Filter without Cardboard Frame, MERV 11, For Aprilaire/SpaceGard 2200, 2250 (201) & Lennox PMAC-20C 24″
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20x25x6, Furnace Filter
SpaceGard Box 20x25x6
A201-SGM-BOX11R | BestAir® 20 x 25 x 6, Air Cleaning Furnace Filter with Cardboard Frame, MERV 11, For Aprilaire/SpaceGard 2200, 2250 (201) & Lennox PMAC-20C 24″