Re: chimney liner
The area of a 3" pipe is 7.07 sq. inches, a 4" pipe 12.57 sq. inches total 19.64 sq inches, the area of a 5" pipe is 19.63 sq. inches, so a 5" pipe has the same area as a 3" and a 4" combined.
If a 6" fits in the existing chimney it won't draw out any more air than the existing flue and if the existing flue worked with the boiler and WH, then the 6" should actually work a little better.
Last edited by JLMCDANIEL; 10-12-2011 at 11:32 PM.
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