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February 2020

Solar

Wow! Smart idea to fill double-walled cavity of greenhouse with liquid soap bubbles

This one was set up by Ross Elliot based on Richard Nelson’s invention of 1994. The cavity is 30 inch thick and R value for soap bubbles is 1 per inch. So it achieves R30 insulation at night when outside is cold and then the bubbles dissipate for the south Read more…

By Aubrey, 2 years2 years ago
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