I have to give props to this site. I pretty much learned everything I needed to know by lurking around here besides the Regency specs. I basically ripped out my old Preway Zero Clearance fireplace and liner. The rock you see is man made by Boulder Creek. It killed my back but its worth it now. The stove is a Regency F2400 I picked up new for $1000. There's 12' of Stainless insulated liner on top of the ceiling box. Works awesome and heats the whole house including upstairs. I have a cathedral ceiling and I put a vent at the end of the upstairs hallway and peak of ceiling. All work was done by me and my brother in-law. He got to do the high stuff since I hate heights!