Large Rocket Mass Heater to Boil 300 gallons of Water

Posted the total of this question on the rocket stoves for greenhouses page https://permies.com/forums/posts/list/40/19178

Here is a simpler part of the question - anyone have experience making a big rocket stove that is capable of boiling 300 or so gallons of water? The basis for my current design is the one in the Blume book for a still. This project is destined to ultimately be a still and a sterilizer for mushroom substrate, but for now will be a water heater for my fodder greenhouse in central PA, to produce 4 seasons.



Thanks!

Brooks
www.NorthMountainPastures.com