I am trying to decide between these two inserts. My house is approx 2200 square feet and the fireplace is in a 30x30 one story section and attached to that is a 25x25 raised ranch. (if that makes any sense) Although both of these have the capacity to heat more than 2200 square feet based on the conditions that it was tested at, I wonder if I would be better off with the Mt Vernon because of the house set up and the cold winters we can get in ME? I of course would like to save the approx 1k, however I'm afraid I might be disappointed in how well it heats my house... Thanks for any thoughts and comments you may have!