Kong
ArboristSite Member
I've got an 8" flue, horizontal ceramic pipe through a block wall into a ceramic lined chimney, 12"x8". Everything is sound. My new stove has a 6" flue outlet so I need to use a reducer.
My stove sits just a little under 24 inches below the 8" diameter inlet to the chimney so its not problem to trim a standard section of pipe and turn it with a heavy fixed elbow before exiting the house.
I could reduce the size right at the stove, simply buy a reducer with the 6" side crimped and then use 8" pipe and elbow above that into the flue. Or I could come out of the stove with 6" pipe, run that up to a 6" elbow, and then put the reducer as it enters the 8" flue.
I can think of what I suspect would be advantages either way. Small pipe keeps the velocity of exhaust gasses high - good thing. Gasses cool rapidly at the adaptor, I know that too - bad thing.
So which is best, reduce it at the stove or reduce it two feet higher up and one 90-degree turn away from the stove but right at the flue?
My stove sits just a little under 24 inches below the 8" diameter inlet to the chimney so its not problem to trim a standard section of pipe and turn it with a heavy fixed elbow before exiting the house.
I could reduce the size right at the stove, simply buy a reducer with the 6" side crimped and then use 8" pipe and elbow above that into the flue. Or I could come out of the stove with 6" pipe, run that up to a 6" elbow, and then put the reducer as it enters the 8" flue.
I can think of what I suspect would be advantages either way. Small pipe keeps the velocity of exhaust gasses high - good thing. Gasses cool rapidly at the adaptor, I know that too - bad thing.
So which is best, reduce it at the stove or reduce it two feet higher up and one 90-degree turn away from the stove but right at the flue?