Here's what I'm trying to do, I want to sit a woodstove inside my existing masonary firplace. The fireplace is large enough for the stove to slide about 2/3rds into, the damper is already gone as the previous home owners had a wood stove plumbed up the damper, but sitting in front of the hearth, which I did not care for as it took up alot of the room. The damper opening is 14X4.5in, into a 13X13in clay tiled masonary flue with a short 90 deg bend just over the fireplace, smoke chamber as far as I can assume from what I've read. The chimney is also about 15ft tall on an exterior wall and while it's higher than anything within 10ft it is level with the roof peak, which only puts it about 2ft above the roof where it's at (low pitched roof). As far as I've read before I need to install a liner, however how to, what I need, etc. has been alittle harder to get. I think I would like to install a ridgid liner at least for the strait run of the chimney and maybe a flex liner through the smoke chamber. Lowes carries double walled stainless steel pipe from Super vent that looks like it would work well, but I'm assuming I'd have to preassembel the pipes before dropping them down the chimney, which I'm guessing would become quite heavy and cumbersome. Any tips trick and possibly a parts list of what I need to do this right and make sure I'm compliant with code?