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Originally Posted by WayneChristie
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Depends on what you want to use it for. Heating up the garage, I think it’s great.
They burn clean and barely any smoke. That clean burning takes a lot of airflow and that moves the heat up and out the chimney, you lose a lot.
I’ve got a similar set up I’m my house (look up German cachelofen) and it’s got a similar burner but also uses a lot of firebrick and ceramics to hold the heat. It’ll stay hot for about 18 hours after I’ve stopped adding wood. 3 armloads of wood is all I need.
Using the rocket stove with some way to harvest the heat out of the chimney would work very well indeed. I’d run the chimney DOWN after it leaves the stove through a metal ash trap that you can clean out and then through a masonry “maze” back and forth a few times before it goes out the main chimney.
It takes a few minutes to get the chimney warmed up and drawing especially because you’re directing the smoke down to start with but once she’s chugging away it’s never a problem. If it’s already warm when you start a backdraft is never a problem.
It’s hard to explain, if you’re in Calgary I can show you mine and you’ll get the idea a lot faster.
If you didn’t want to be Uber efficient like above you could lay up a bunch of bricks around the stove, and use them to trap heat and let it out slowly over a period of time. Add a fan to the set up and it’ll work even better.
Liberator Rocket Stove
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