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by Freestyler_3 1297 days ago
Why heat your house when the sun does that already?
1 comments
walterbell 1297 days ago
For those with sun-facing windows: DIY solar box window heater, https://www.homeconstructionimprovement.com/solar-box-window...
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voisin 1295 days ago
Looks like a version of a Trombe Wall?

[0] https://en.m.wikipedia.org/wiki/Trombe_wall

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