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Convert wood stove to rocket bell (& mass) heater, simply

Posts: 138
Location: Ontario
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Is that gasket material around where the old doors were, sealing that gap well enough? You could be losing draft because it is pulling air from that gasket. Maybe try sealing that with refractory cement instead.
Posts: 21
Location: Southeast Kansas
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Thank you for the helpful comments, folks. I sealed the hole at the bottom of the chimney, and that seems to have caused a noticeable increase in the draft. We've tried burning it hot today, and haven't had any trouble with smokeback yet. Maybe that will be all we needed to do!

I don't know how to tell whether the superwool is forming a good enough seal in the gap where the doors used to be. I'll try holding a lit match near it to see if there's any air movement toward the seal.

I haven't tried raising the plunger tube yet; as I said above, maybe I won't have to.
Posts: 3124
Location: Upstate NY, zone 5
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Glad the draft seems to be improved! You might try a stick of incense for leak detection - the smoke will show air currents more sensitively than a match flame.
Humans and their filthy friendship brings nothing but trouble. My only solace is this tiny ad:
Rocket Mass Heater Plans: Annex 6
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