I just bought an older house with a small fireplace. The opening is 24" wide by 26" high. I had an inspector come out ane even though he couldn't get on the roof today told me it has a good liner and should be OK to use after a sweep. Due to clearance issues he said I probably could not use an insert. I'm thinking doors, but can't seem to find any this small. I'd appreciate any recommendations. I would like to burn wood, but want to get SOME heat out of it if possible. Thanks in advance for any advice.