http://www.smarthome.com/3011/6-In-110VAC-250CFM-In-Line-Duct-Fan-DB200/p.aspx Here is what I have in mind. I have a ranch and my wood stove is located at one end of the house. In order to heat the rest of the house the room that the wood stove is in gets really hot. I'm thinking of cutting in some duct work in the ceiling where the wood stove is located, run 6" diameter flexible aluminum ducting (and insulate it), install this fan at some point in the run, and dump it through the ceiling at the hallway at the other end of the house. I just want to distribute the heat a little better. Fans on the floor work but I hate the way they look. I would throw this on a switch and flip it on and off when necessary. Couple of questions.... Is the flexible aluminum duct work ok to use? The package says it can be used for a/c, heating, or exhaust so why not?? I'm thinking a 4x10 register in the heater room. This size just looks right to me, do you suggest anything else? Where in the run should I install the fan? My thought would be closer to the room that its pulling from. Is 250 CFM enough? To get 500 cfm I'd have to go up to 8" duct work. But i've only looked at Home Chepo. I'm onlying going about 25'. Thanks in advance for the input!