How to Measure Your Furnace or AC Filter

How to Measure Your Furnace or AC Filter furnace filter slot Magnetically attaches to ductwork to cover furnace filter slot door Two-piece design works with any 1-inch furnace filter up to 25 inches long Universal one- furnace filter slot cover To make your filter and HVAC system the most efficient, check out FilterLOCK This inexpensive

furnace filter slot cover Image: Cat Meme About Air Filters Likewise, an air filter that's too small for the slot will leave air gaps that bring contaminants in and let

slot sahara We're All About Sealing Up Ductwork In the video above we explain a very easy simple tip to seal the space around your furnace filter slot  If your filter slot on your furnace is exposed, dust and dirt can bypass your filter and go