The stuff might be used as general heating if the house is well insulated, and you don't need excessive amounts of heat. Note that heating with electricity is often more expensive than other choices in most places in the country. As a result, it is more common in places like a bathroom where a warm floor is appreciated after you get out of the bath in your bare feet. I could see using it in tiled entryways would be good, as you may be taking off your wet, snow-covered boots. A warm floor would be appreciated there. It is often coupled with a tile installation, as it works best embedded in masonary materials that act as a good thermal mass. Yes, it can be used in any room. This is all covered on their website www.nuheat.com.