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We seem to produce waste at prodigious levels.
Water heaters that don't connect to the waste heat from an ac plant.
Vertical walls facing the sun that could be moderated by a shield that produced either electricity or hot water. Why do solar cells sit on roofs?
For a small drop in effectiveness you increase overall efficiency. Make the cells into louvres that cover the West wall and East wall of the home.
Place black.pipe on a wall that faces the sun and heat your domestic water.
I made a frame a few years ago that had black pvc pipe in it backed with sizalation and faced with Lexan.
It cost about 200 dollars and produced 7kw of heating ALL DAY
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