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20x24x2, Furnace Filter
BestAir® Pro 2″ Series 20X24 MERV 8
BA2-2024-8 | BestAir® 20 x 24 x 2, Air Cleaning Furnace Filter, MERV 8, Removes Allergens & Contaminants, For 2″ HVAC Pleated Filter
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16x27x6, Furnace Filter
SpaceGard 16x27x6
A401-SG4-11R | BestAir® 16 x 27 x 6, Air Cleaning Furnace Filter without Cardboard Frame, MERV 11, For Aprilaire/SpaceGard 2400 (401) & Lennox PMAC-12C 27″
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16x27x6, Furnace Filter
SpaceGard Box 16x27x6
A401-SG4-BOX11R | BestAir® 16 x 27 x 6, Air Cleaning Furnace Filter with Cardboard Frame, MERV 11, For Aprilaire/SpaceGard 2400 (401) & Lennox PMAC-12C 27″