www.suncourt.com/eq2.html With all the latest talk about floor grates and moving heat to upper levels, I thought I'd try something new. I purchased a register booster fan. Anyone ever try one of these? They fit over a 8x12 vent max, and move about 200cfm at about 27watts. Even have a thermostat. Mine is running right now and seems to be working better, but a little more noise than the small doorway type fan I had in my vent before.