I have a Lennox Furnace. The filter is a huge basket like thing with fiberglass in it. It is supposedly washable. But it's so big I can't put it in the sink. I take it outside and wash it with the hose. Obvoiusly I can't do that in the winter. Besides that the fiberglass keeps coming off. I've replaced the fiberglass but it's a pain in the butt.
Anybody know of any way to modify it so I can use throw away filters? I've asked a couple furnace guys and their response is usually they'll fix is for a couple thousand dollars and throw in a new furnace.