Which Way? The Direction of Air Filter in Furnace
Getting the direction of air filter in furnace right might seem like a minor detail, but it's actually one of the most important things you can do to keep your HVAC system running smoothly. It's one of those "set it and forget it" tasks that everyone knows they should do, but when you're standing there in a dusty utility closet holding a fresh filter, it's surprisingly easy to forget which way the air is actually moving. ...