I am getting some black water dripping out of my flue with my woodgun. Wood is extremely dry, it hasn't rained/snowed and has never happened before. I assume the flue gasses are not staying hot all the way up the flue so does this mean there is a restriction somewhere slowing their velocity down. My flue is stainless, wrapped in a special insulating wrap inside a brick chimney and is approx 30' tall. Would a few plugged nozzles cause this?
condensing flue gasses
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brant2000
Feeling the Heat
I can't speak for the Woodgun, but I occasionally will have a small amount of condensate drip out from my stovepipe/wall thimble connection. It generally happens when I'm first getting things warmed back up after not having a fire for a day or more. I only ever observe it while my flue gas thermocouple is reading temperatures below 300 deg F.
BoilerMan
Minister of Fire
I have had this once or twice usually during 1st start up of the season, although my condensation is in the ash pan. Those that have reported the same thing as you, it seems it's usually a blockage somewhere. Nozzle is easiest to check along with the bottom of the cyclone.
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