iam looking for a pellet stove to heat my 1600 sqft colonial with 3 bedrooms and bath upstairs.i was thinking about putting it on the first floor in the living room that is 24x12 with a double wide door that opens to the hallway and stairway.the house has all new replacement double pane windows and spray foam insulation on all exterior walls and upstairs ceiling.i was looking at the harman xxv and thought this should be more than enough but i would like to know what everyone thinks would be good. ps i also have a rinnai direct vent wall heater in the same room that would serve as backup or work in tandem. thanks for what ever info can be provided.