NSMaple1
Addicted to ArboristSite
I'm not sure how long those 'G' Heatmasters have actually been around, but they seem to be getting good feedback & reviews. I thought they were an OWB, but just saw note recently at 'another place' about them being able to be used indoors too. From a quick look at specs (I was surprised to see 6"), you might be tight getting it piped into your current chimney thimble, height-wise. But not sure what you are able to do about your thimble height - if you need to do something. I think they're open, also - so should be a more straightforward swap. I would definitely short list it. Also, I don't really have any idea how much any of the ones talked about actually cost - seeing some numbers might be interesting.