Xwoodburner wrote:My draft starts out.06and slowly goes down overnight to .02-.01
I believe the cause of this could be -
#1 - air is bypassing the coal bed during the night and your fire is starving and going cold (cracked liners and/or bypass passages in the liners)
#2 - your primary air feed is set too low not allowing enough heated air mass up the chimney to maintain negative draft pressure which in turn lowers the amount of combustion air coming in to feed the fire which in turn causes your fire to starve and go cold..
The cracked liners may not be contributing completely to the above condition.
Although a baro does nothing to improve the negative draft pressure in the chimney, it will allow you to run your primary air control a little more open and you won't get the "runaway freight train effect" of a growing fire that is feeding its own draft making it stronger and forcing it to burn hotter.. You can tell by now that I totally believe in my baro damper
its saved me thousands of trips up and down the basement stairs tweaking the primary air control. Instead the baro does this automatically by maintaining a consistent negative pressure in the firebox..