I have a 25 year old wood-fired boiler with a 7" flue outlet. It is
currently vented into a similarly sized flue of a 20 foot interior
chimney, except for the 6 feet above the roof.. It has excellent
draft but I am having a problem with creosote.
I would like to install a 5 1/2 X 5 !/2" stainless 316 rigid flue
liner, surrounded by 1/2" of Super Wrap insulation, which will fit
inside my existing clay flue liner.
Because the new liner would be the equivelent of a 6" liner and my
boiler outlet is 7", will there be a problem with code. I don't
anticipate any problem with draft. Otherwise, I will have to remove
my existing clay flue liner.