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Cheap air heating system with solar

 
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Location: Southern Indiana zone 5b
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I don't know how powerful this can really be, but in a green house situation in the cold months perhaps on a timer the heated tile could provide adequate warmth.

I'm really digging this green power science channel today!

http://youtu.be/aetmswE70dM
 
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I've embedded the video below.

 
I've got no option but to sell you all for scientific experiments. Or a tiny ad:
Permaculture Voices 1, 2 and 3 - all 117 hours of video!
https://permies.com/t/voices123
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