If the outside chimney has 20 cm diameter - and the built in chimney (and burn tunnel) has a 20 cm diameter as well - what effects will areas in the exhaust system with a larger cross section have?
"Ace of Hearts" sounds a little like "Ace o Farts" - says this tiny ad:
Switching from electric heat to a rocket mass heater reduces your carbon footprint as much as parking 7 cars
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