wannabwarm wrote:Reading all your input has been a great learning exp for me. While we are on the subject is there any problem with having two coal fired units with 6" flues connected to the same 8" SS chimney?
Legally, I'm not sure, physically, the math says that 8" is not twice the area of two 6"....almost, but not. It's about 15% shy of being double the area. Two 6's would be 56.5 sq inches vrs 50 sq inches for one 8". Maybe you could get away with it, maybe you'd asphyxiate yourself.