House came with boring prefab wood fireplace. Owner previous to me crammed in a wood burner, even going as far as to cut tin from the prefab to make it fit. I'm pretty sure he shouldered the thing in there. Might as well have had a hole in the wall in leaked to bad. Not to mention the fire hazard. I gutted the thing and installed a Harman 52i pellet insert. Even sprung for the enamel paint. I have 2000 sf on the main level with vaulted ceilings and an open balcony to the second floor. This thing is fantastic. Heats up all the space no problem. It's almost too good. I have to turn it down so the heat pump kicks in and heats the basement. I plan on putting a pellet stove down there when I remodel it sometime in the future. If you're looking for a good pellet insert, this thing rocks. Well worth the money.