how much btu heater do i need
In warmer climates, you may need only 30 to 35 BTU per hour per square foot to heat your house adequately. In colder climates, you may need up to 50 to 60 BTU/h/ft 2. In general, the further from the equator you live, the greater the number of BTU/h/ft 2 you need, but weather patterns and geography modify this somewhat.