Originally Posted By: BobS



Also look into solar air heaters for some free room heat. A solar air heater is about the size of a medium window and produces as much heat as a 1500-watt electric heater.

It needs a small electric fan to circulate air, but a very small solar panel and a computer fan can work for this. Making it 100% free heat.


http://www.solarsponge.com/article.htm
Awesome.