21x23x1 MERV 11 Furnace Filter. Captures large airborne allergens including: household dust, pollen and mold spores. It is recommended that these be changed every 3 months. Absolutely Essential for Allergy Sufferers! Designed & Engineered by Crucial Air.
21x23x1 MERV 11 Furnace Filter. Captures large airborne allergens including: household dust, pollen and mold spores. It is recommended that these be changed every 3 months. Absolutely Essential for Allergy Sufferers! Designe...
