I am also new to heating with wood. I have purchased a 1600M Clayton wood furnace to stand next to my propane furnace (which is much too expensive!). Anyway, I know how I can hook up the supply and chimney venting, but the manual doesn't really show how I can hook up a cold air return to the furnace. It talks about how important having the return air is, but doesn't give me a picture of how to hook it up. Does the air duct just need to be sitting next to the furnace on the floor? Thank you, David