Speaking of upgrades, if your AC unit or your furnace is more than 15 years old, it may be time to replace them. Newer models are bound to be more energy-efficient and require less maintenance over time.

You can also invest in heating or cooling systems that better match how you use the house. If you spend most of your time in a single room, for example, you may be able to save on energy by getting a space heater. An electric Napoleon fireplace is also an option, as can be seen on https://smokeymountainfireplaces.com/collections/napoleon. Installing a smart thermostat may also lead to energy savings.