Hi, new to the forum but have been trying to search on my own for the answers, but no luck. I bought a house that had a prefab zc fireplace with Supervent (jsc) 8" ID class A chimney. The fireplace gives off very minimal heat and is burning through wood ( no pun intended). We would like to replace with a more efficient fireplace. We had a quote from a local company for around $11,000 for replacement and reusing our chimney. It was a Wilkining grandview and all the install, but no mudding of drywall, or putting up a surround....etc but anyways...I asked for another quote if i did all the framing and such, so the requested quote was just for the fireplace, install to current class A chimney and fresh air intake...but they havent gotten back to me in 3 weeks. Anyone know of any other manufactured fireplaces (wood) that i could use with the Supervent (jsc) 8" exhaust? The chimney is in great shape, I'd hate to have to tear it out. Can I run a 6" flue liner down the Supervent Class A chimney and basically pick any ZC fireplace i would like that has a 6" exhaust?. Hope I explained the situation competently, and appreciate any help or info.