Am also looking to heat the aquaponics greenhouse with a rocket stove.
Using the mass stove design I plan to run the heating ducts through the 800 gallon tank using it as the heat sink.
If the tank is maintained at 80F then the greenhouse should stay warm. The additional heat from the stove itself should then keep it at a growing temperature.
The advantage of the rocket stove is clean exhaust. The plants love the moisture and the CO2. So why vent outside?
Any one have any ideas on how to get water tight heating ducts.
