How to Change a Furnace Filter the Right Way
Most people learn how to change a furnace filter the same way: they pull out the old one, notice a small arrow printed on its cardboard frame, and wonder whether it matters. It does. It also helps to know where the filter lives, because on some furnaces it isn't where you'd expect. This walkthrough covers all three: where to find it, which way it faces, and how to swap it cleanly. Your furnace's model manual gets the final word on anything specific to your unit. Quick Answer: Turn the furnace off, find the filter slot where the return-air duct meets the furnace (or behind a wall or ceiling return grille), and slide the old filter out. Confirm the correct size, then install the new [...]









