I have a two story foyer and the heat just sits up there on the 2nd floor. I would love to distribute it to the remainder of the second floor. The good thing is I have a forced hot air furnace in the attic that I was thinking about using the fan on auto. If I eliminated all of the current 2nd floor returns and created one right at the top of the stairs and ran the fan, would that work? My only fear is the furnace and all the duct work is in the freezing cold attic.