So my RMH project is working! Burning ashkindling it works well but when I want to let it go out it starts smoking back into the room. Obviously at this point there won't be the heat to drive the system so is there a good way to deal with this? I'm guessing you're going to tell me to cover the burn chamber but thought I'd ask first
What kind of chimney do you have? What kind of horizontal ducting, and what mass? If you have any thermal mass and a decent chimney, that should help the draft even as the fire dies down.
posted 2 years ago
It's a 6" RMH about 8m horizontal run then exits and goes up 3m outside, the first 5-6m is packed in about 2tons of cob and brick. Part of the cob warms up but definitely not the whole thing. It does keep drawing for quite a long time after going out but it's very windy here so we get the odd back draft when it's not burning strongly