[mike31154]

ROI on the electric infloor heating? It's going to take a while to figure that out since I've only installed the small 183 watt loop recently by the bay window, approx 20 sq ft. My living room faces north, I think the bay was an add on by a previous owner and that area of the room has always been a little cool in the dead of winter. So the ROI was not a prime consideration when installing this, I'm just glad that this area is now a little warmer without having to rely on the forced air furnace. Heck, I use 3 times that amount of power to light up my fish tank! Not sure what the cost of the system was anymore since I purchased it a while back. As I mentioned, the electronic, digital thermostat with built in GFI (a requirement apparently) cost quite a bit. I think almost $280, that almost made me flip out and reconsider. I think they may have a less costly mechanical thermostat available, not sure. I just set up the heating cycles last week. Similar to most modern digital thermostats with different programming options etc. The features are way overkill for what I'm using it for at the moment. An On Off switch would probably do the trick just as well. The heating loop itself was less than $200 I think. It's made by True Comfort Systems and I got it at the local HD.

You need dedicated circuits from your breaker panel for any electric heating and the larger runs for more power/square footage are wired for 240 volt, same idea as your electric dryer or range. Even though I only have a 183 watt run at the moment, I've used 12 guage wire so it won't be a problem to tap into that run when I get around to doing the kitchen & bathroom floors. Should be able to do all of them on one 15 amp circuit, my house is not large by today's standards.