Does anyone know if it is wthin Massachusettes Code to use an unused chimmney to run a direct vent (90+) pvc intake/exhaust to the roof?
it is probably about a 35 foot run atleast. Old furnace is coming out and customer wants a 90+ system to go in, but with all the windows, obsticles, etc. the now unused chimmney seems to be the logical solution.
Personally I have never seen it done before.