Hello, This is my first message. I am going to put a gas stove in a 1350 sq. ft. two-story house in Minnesota. The house has moderate insulation. It was built in the last century and I put all the insulation I could in the house. It presently has an all electric forced air furnace but this will be very expensive to run. I am thinking of two gas stoves: JÃ¸tul GF 400 DV Sebago, 16,000-32,000 btu, or JÃ¸tul GF 600 DV II Firelight, 20,300-40,000 btu I will use a ceiling fan and rig my force air furnace to circulate the heat. Does anyone have any ideas about which size would be best? Thank you!