Air conditioning is a significant contributor to the energy usage in American homes, with the US Energy Information Administration reporting that it accounted for 19% of energy use in homes in 2020. Central air conditioning units typically use between 3,000 and 3,500 watts, while window units range from 1,000 to 1,500 watts. The cost to run an air conditioner can vary depending on factors such as the size of the house, the wattage, and the BTUs, but the average monthly cost for most people ranges from $70 to $144 during the summer months. Central HVAC systems with heat pumps use a comparable amount of energy as conventional air conditioners.
To determine how much energy your air conditioner uses, you can gather information about your home and appliances and calculate a ballpark number yourself. Your electric utility may also provide information about your energy usage, and installing a home energy monitor can give you real-time data about which electrical appliances are adding the most to your bill. Factors that affect an air conditioner’s energy use include the size, age, and type of unit, the outside temperature, and your desired temperature inside the home. Keeping your AC unit well-maintained by cleaning or replacing filters and performing other maintenance tasks can improve its energy efficiency and overall performance.
One of the best ways to reduce air conditioning costs is to cool your home naturally when possible by opening windows in the morning and closing them and using shades during the hottest parts of the day. Additionally, bumping up the set point of your thermostat to between 74 and 78 degrees Fahrenheit during the day and 82 to 85 degrees Fahrenheit at night can help keep your space cool while operating efficiently. It’s also important to keep your air conditioner clean and well-maintained to save money in the long run. Considering an upgrade to a new, more efficient system if your current one is old could also be worth the investment, especially with the potential tax incentives available.
Overall, the energy use of an air conditioner can vary depending on factors such as the climate in your area, type and age of the unit, energy efficiency of your home, and preferred temperature. Taking steps to reduce your use of the air conditioner, such as utilizing natural cooling methods, setting your thermostat efficiently, and keeping your unit well-maintained, can help lower your energy bills during the hot summer months. Considering an upgrade to a more efficient system may also be beneficial in the long run, especially with potential tax incentives available for new installations.
