We have a late 70s built log home (wood heat of course). Up at the top of the vaulted ceiling is a mushroom shaped fan enclosure which blows warm ceiling air down to floor level. Recently I was in a local business which had a similar unit, but attached to the bottom of the fan was a long cylindrical tube - which conveyed the warm ceiling air down to the floor. The flexible fabric tube was marked Strato-Therm Heat-Siphon. I would love to find out where to get that fabric tube, and possibly purchase more of these fans. A web search did not reveal anything. Doe anyone else have one of these systems, or know if the company is still in operation? Thanks!