Maybe I can get Juergen to build me one of these to heat my green house. I've seen this with cans, but maybe this is even better. We could buy a solar powered fan to run it on. It could be put on top of the garage, with the green house next to that. Then I could grow plants 12 month a year. And if it works well, maybe we could add this to our balcony and help heat our house with it.