“The Zero Energy Thermal Mass Greenhouse solves the problem of freezing weather and a short season climate when you need to grow food. There is no grid connection for heat. It will work anywhere. The two big things that it does best is to allow you to grow transplants to extend your growing season, and reduce the plant maturity days of each crop that you grow. You can also grow summer foods in the winter. It can also be used as a work space to dry vegetables, process honey from your hives, etc.”
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They have more videos on YouTube and a book on Amazon.
This is a variation of the walipini greenhouse. Search our blog for previous articles.