LED bulb might work, the kind you screw into a regular light socket, they do get pretty warm. I left my cabin this winter for 2 days over the holidays, i left 2 bowls of water, but when i checked when i got home, the water was frozen solid! Sorry kitties :D .. On the homestead I'll be experimenting with biomass and a air pumped earth battery .. Thanks for the post :D
Worth trying a few out I suppose. Have not heard of this air pumped earth battery! Thanks for the comment ^_^
Think of a passive solar design greenhouse having a basement filled with dirt and gravel. In that dirt and gravel every couple feet is laid air tight flexible drain pipes (kind of like the hot compost pile water pipes, but for air). For much of the hot summer, you have a fan blowing the hot air down there. It snakes back up for the air exit on the other side of the inside of the greenhouse. In the summer it cools and dehumidifies the air for you. In the winter the fan draws up the pipe the saved up heat from the gravel and dirt. For every foot deep it is supposed to give you a month of relative heat, something like that :D .. this guy in BC talks about it ..
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Wow excellent! That's what the guy in the video I posted here was describing but this is much better, thankyou :)