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Books by Ray Wolf

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2 books found
Solar air heater: Mounts on any sunny wall, turning solar energy into free heat for your home (Rodale plans)
Solar air heater: Mounts on any sunny wall, turning solar e…
By: Ray Wolf
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Insulating Window Shade: Reduces Heat Loss Through Windows by 80% (Rodale plans)
Insulating Window Shade: Reduces Heat Loss Through Windows …
By: Ray Wolf
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