Also great is the eco-heater! We have seen them installed in houses and even chicken coops, but we don't have one ourselves. Maybe some day... http://www.eco-heater.com/

Very interesting. I was a bit dubious of their claims --- after all, it's still electric heat (which makes me cringe.) On the other hand, the ecoheater does seem to use a quarter as much energy as our little space heater (although I'm looking at the maximum power rating there and Mark keeps it on low --- I'll have to hook it up to the Killawatt at some point and get some real data.)