I was reading the post on the "Magic Heat" product and how it produces more creosote becuase of the cooled flue temps and wondered why this doesn't hold true with masonry heaters. After all their incredible efficiency ratings are due to exhaust heat being absorbed into the masonry structure, right? Wouldn't this reduction in temps promote more creosote buildup like the applications with a "magic heat" product? How is flow maintained with the convoluted exhaust system? How the devil do you clean it? Ok, shed some hearth light upon me.
So how does a masonry heater prevent creosote buildup?
- Thread starter Rockey
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Properly run with optimally dry wood, masonry heaters have almost incandescent combustion. The flues basically become secondary burn tubes and burn off all the gases and particulates as well as any soot. Combustion proceeds until the wood is gone and the masonry mass is heated. In a way but not exactly, each time the heater is fired it's like a self-contained chimney fire. That's why they remain clean. There are usually clean outs in some of the flues that provide areas to remove fly ash.
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