I made a couple small batches of charcoal in the shop furnace t on day. Then I dumped them in the milk can to cool to add some extra BTU’s to the greenhouse this evening.
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Look up the seachar TLUD, that puts out some btu’s, and bulk amounts of good charcoal.
I built one last year,a keystone stove but I can’t use it in this greenhouse. I may bury the milk can in the floor for now to store the heat from the cooling process longer. It is still cold enough here to need a second shelter in the greenhouse. To leave the plants out there overnight…This is a new to me solaraim still under construction. It will eventually be heated by hydronic solar. For now some thermal mass will get me through this spring. Cooling will be a problem very soon. I had temps from 31* Ina four foot deep pit to 132* say the ceiling vent at the same time yesterday. It is 21* n there this morning.
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