Heat pumps are more efficient than a traditional furnace, especially during the shoulder periods of the year when temperatures range between 0°C and -10°C. Systems that use fossil fuels, such as natural gas, propane, and others, are significant contributors to CO2 emissions. There’s a misconception that natural gas is clean, but we must remember these are still fossil fuel-burning items that contribute CO2 to the atmosphere. While furnaces are generally safe, they can produce carbon monoxide in the home. Heat pumps allow you to switch to a cleaner fuel source, reducing your carbon footprint.