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16x28x4, Furnace Filter
SpaceGard 16x28x4 MERV 13
AXP-413-13R-2 | BestAir® 16 x 28 x 4, Air Cleaning Furnace Filter, MERV 13, For Aprilaire/SpaceGard 2400 (401) & Lennox PMAC-12C 27″
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16x28x4, Furnace Filter
SpaceGard Box 16x28x4 MERV 13
SG413-BOX-13R | BestAir® 16 x 28 x 4, Air Cleaning Furnace Filter, MERV 13, Removes Allergens & Contaminants, For Aprilaire/SpaceGard Models
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16x20x4, Furnace Filter
Honeywell 16X20 MERV 8
HW1620-8R | BestAir® 16 x 20 x 4, Air Cleaning Furnace Filter, MERV 8, Removes Allergens & Contaminants, For Honeywell Models