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20x20x4, Furnace Filter
Honeywell 20X20 MERV 8
HW2020-8R | BestAir® 20 x 20 x 4, Air Cleaning Furnace Filter, MERV 8, Removes Allergens & Contaminants, For Honeywell Models
HW2020-8R | BestAir® 20 x 20 x 4, Air Cleaning Furnace Filter, MERV 8, Removes Allergens & Contaminants, For Honeywell Models