I will be in the market next year for a new epa more efficient wood insert for my house. It is not quite 1800 Sq. Would love to stay under 1500 if possible. There are so many out there to look at I don't know which ones to look at first. Someone help me out please. I've got a Fisher insert that I bought from my old farm boss that was just sitting in the barn a few years back and just want something more efficient.