I've read many post here with regards to sizing and heat. I understand these wood inserts kick a lot of heat. Rather than try to describe my layout I'll just post the pics. It's a 2300sqft rancher that is pretty much a circle, it's kind of open but you can see in the pics. In the main living room where the fireplace is has 12ft ceilings at the peak. The distance form wall to wall which includes the main living room, entrance way and dinning room is 45'x15.5'. The little hallway is what completes the circle. I'm thinking about either the osburn 2000 or 2400. This winter has been pretty mild here for eastern PA but they can get pretty cold. My house is ALL oil so I burn almost 800gal a year. House is not super efficient obviously. I'd be looking to use this unit just to supplement some of the oil. If I could cut the oil in half that would be perfect. I'd have to get comfortable with the unit to burn during the day when no one is home though. I'm sure some strategically placed fans could make this work but wanted to see what everyone thought based on the layout. I just don't want to cook myself out of the main room I spend my relaxing time in. The bedrooms have their own zones for the oil so it's not super important to try and heat the rooms with the stove. Let me know what you guys think. Thanks