Another data point: Our fairly old house, heated with an air heat exchanger, use about 60 kWh per day during the winter months. The power draw for heating is re

Another data point: Our fairly old house, heated with an air heat exchanger, use about 60 kWh per day during the winter months. The power draw for heating is reduced to almost nothing during the coldest period when the outside air is too cold and we use firewood. Apart from heating the house, we also use some power for hot water and pumping water from the well into the house.