I got my greenhouse heat furnace to draft properly just by making the fire hotter. This wood heat source will allow me to extend the growing season (Zone 7) into Winter for cold-weather crops.

Watch the greenhouse build video:

This greenhouse features a hugelkultur bed and a walipini-style trench for ambient heat from the earth. It also has an Earth Air tube. Together with the wood burning rocket mass heater, the greenhouse will enjoy warmer temperatures into winter.

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