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Comment by Freestyler_3 | Hacker News Reader
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Freestyler_3
·
Why heat your house when the sun does that already?
View on HN
walterbell
·
For those with sun-facing windows: DIY solar box window heater,
https://www.homeconstructionimprovement.com/solar-box-window...
voisin
·
Looks like a version of a Trombe Wall?
[0]
https://en.m.wikipedia.org/wiki/Trombe_wall
Reply on news.ycombinator.com