All it takes is a water pipe painted black zigzagging inside a box which is black inside and has the sun facing side replaced by glass.
You can get hot water from something like that even in Winter.
All it takes is a water pipe painted black zigzagging inside a box which is black inside and has the sun facing side replaced by glass.
You can get hot water from something like that even in Winter.
SaveTheTuaHawk@lemmy.ca 1 week ago
you can get>200F from a passive solar air heater made of soda cans on a 30F day.
www.instructables.com/Aluminum-Can-Solar-Heater/
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