How much fossil fuels does it take to heat or cool a house?

The amount of fossil fuels required to heat or cool a house varies widely based on factors like the home's size, insulation quality, climate, and the efficiency of the heating or cooling system. For example, a typical natural gas furnace consumes about 100,000 to 200,000 BTUs per day during winter months, while air conditioning systems can use significant electricity, often generated from fossil fuels. Overall, a well-insulated home using efficient systems will require less fossil fuel compared to older, less efficient homes.