top top wrote:Just saw your post, have you looked at an actual duct fan? These are available in various sizes from about 4" on up and do exactly as you described. A fan mounted on the wall, a flexible hose on each side. My coal stove is in a room with high ceilings, the adjacent rooms are much lower so the heat doesn't circulate very well. I use two of these with the intake hose connected to a trim ring near the ceiling in that room, the discharge side to a trim ring near the floor in the adjacent rooms.
http://www.homedepot.com/p/Suncourt-Ind ... kw__pmt_e_
That sounds like a good idea for a project i am considering in my house.
I will consider that as a possibility for my shop project too.