The Handbook of Solar Air Heating Systems. DIY Home Solar Power Panels
http://www.ush2.com/where_to_start.htm How to heat your home with solar hot air. This is so simple, some wood, and glass, and you can get the glass for free, listen to the promo. This book has solar hot air heaters that will pay for themselves in weeks or a month or two. Step by Step, full illustrations and complete materials lists.
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