Your mention of a space heater reminded me that there are also infrared space heaters -
http://www.google.com/#q=infrared+sp...w=1360&bih=668

also Far infrared lights, clothing & other products - has info about it too -
http://www.firheals.com/catalog/index.php?cPath=43

There are many other sites w/ similar products and more info, a web search will bring them up.