20x20x1 furnace filter 12 Pack made in USA! Say goodbye to dust and allergens with our 20x20x1 Air Filter MERV 1Its pleated design increases the surface area for maximum filtration efficiency, ensuring cleaner and fresher air in your home.. Experience Wicked Clean Air with the 20x20x1 Air Filter MERV 13! Our USA-made furnace filter is designed to fit perfectly into your AC unit, providing exceptional electrostatic filtration to trap even the tiniest particles
