I've been back and forth trying to find some data on barometric dampers and wood units. I know there are many users on here that use them on gasification boilers and forced air wood furnaces. Its been said many times when flue temps drop below 300* there's a chance for condensation in a chimney.
Last year I observed exhaust temps at the top of the chimney around 100*f. I was worried about condensation so I manually regulated air to keep up temps in the chimney. This year I decided to go back to a baro, and found some interesting articles.
We keep our furnace at .05"-.06" according to the manual.
The article stated that a unit with a higher efficiency requires a proper diameter liner. What caught my eye was a baro introducing a dilution of dry room air into the flue lowered the risk for condensation regardless of the flue temps. This was in oil furnaces, but one ran 300*C without a barometric damper had condensation while the other running a baro with temps of 160*C didn't have condensation. It's also stated the lower the co2 the greater chance for condensation.
Does anyone have any thoughts on this? We had condensation before lining the chimney, but after lining and seeing this I feel better about the use of a baro. Today is very windy and thinking about our baro made me look for some articles. I don't know the exact science behind this but if anyone knows please tell.
Last year I observed exhaust temps at the top of the chimney around 100*f. I was worried about condensation so I manually regulated air to keep up temps in the chimney. This year I decided to go back to a baro, and found some interesting articles.
We keep our furnace at .05"-.06" according to the manual.
The article stated that a unit with a higher efficiency requires a proper diameter liner. What caught my eye was a baro introducing a dilution of dry room air into the flue lowered the risk for condensation regardless of the flue temps. This was in oil furnaces, but one ran 300*C without a barometric damper had condensation while the other running a baro with temps of 160*C didn't have condensation. It's also stated the lower the co2 the greater chance for condensation.
Does anyone have any thoughts on this? We had condensation before lining the chimney, but after lining and seeing this I feel better about the use of a baro. Today is very windy and thinking about our baro made me look for some articles. I don't know the exact science behind this but if anyone knows please tell.