We recently purchased a 60 year old home and upon buying we replaced the old furnace with a Lennox G60UH(x) series 80% efficient, 2-stage gas furnace.
The old furnace vented out to an OLD mason chimney. When we had the new furnace put it, the furnace guys put in a new liner to the chimney.
The chimney is in major disrepair and needs to be replaced. We would like to know if we can replace it with "something else" and if so, what are our options for "something else?" We've heard that PVC can be used, but perhaps not on an 80% furnace.
What options do we have? If we can go cheaper by just tearing down the already-crumbling masonry and adding on a pipe - great!