Lightning wrote:Barometric or Manual damper is mostly preference. When I first started burning coal, I only had a manual damper installed. My problem was that I couldn't achieve a steady heat output. It was constantly yo yo-ing. I'd close the primary air feed a little and temp would spiral downward. Then I'd open it a little and the temp would climb to hot. A barometric damper solved all this madness. Now I get a 12 hour burn with only a few degrees of variance thru the whole burn time.
That's the purpose of a barometric damper. It regulates the negative pressure in the fire box which makes for consistent heat output.
There is endless controversy over the two dampers. Fred uses a manual. During severe cold temps outside I use a combination of both. But mostly I let the barometric run the show.
It really depends upon the stove. some stoves do very well with one or the other - I have only a manual damper, I get perfectly steady heat output... But if I had your stove, I'd probably need the baro... And, I get way beyond a 12 hour burn unless I'm flat out in the coldest part of the winter then I get more like 14 hours...It's all stove dependent... I've never run the 50-93 the original poster is installing... those that run them should say what works best for them...