Subject! 16x8 greenhouse from old windows and poly carb sheets.
by
Comas
Best way to regulate heat, humidity, co2 ?
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Suggested Project Book
Find a copy of The Solar Greenhouse Book by James C. McCullagh. Even if you don't go solar, it has so much information you can use from orientating your building to everything you are asking. Heating a greenhouse in the middle of winter can be expensive, so what you can take from this book and apply will be to your benefit.