Instead of butt warmer, I'm looking for a greenhouse warmer. Can anyone please help me with this idea:
Build a brick rocket stove in one corner of the greenhouse. (10x24 greenhouse) Exhaust stove pipe comes out and goes down into a ditch, (or underground) the length of the greenhouse (say, close to the long south wall). MAIN QUESTION: Will it draft if I put it in an 8" pipe going down into the ground in a 15" deep ditch for a 20' run before coming up out of the ground and up and out the "chimney" at the other end? Also, if I use 8" pipe can my ditch be less than 15"?
Fill ditch covering pipe with mortar up til level with the ground. Lay 55 gallon steel drums on their side, end to end, in/on mortar ditch for good contact with barrel sides with the mortar. I will then fill the barrels with water for my thermal mass being heated by the warm mortar once I've built a fire in the heater at night. Hoping this will cause the barrels to release heat all night long. (I understand for heating purpose thermal mass of water is 4x that of cobb or mortar.)
I will put these barrels UNDER my raised growbeds that will line the south wall. (as my GH is only 10 ft wide) I will also have growbeds on the north wall. This entire design could be moved to north wall, doesnt really matter which wall rocket system is installed.... Whatdya think? Thanks!