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By Jens Pohl. Author Jens Pohl. He discusses the sun as a natural heat source and describes the principles of active and passive solar building design solutions. Cover design by Andrew Magee. 1 Technical Underpinnings in Mathematics and Physics.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.