Smart Ways to Keep Cool and Cut AC Costs in This Summer Heat

Summer has officially arrived — and it’s coming in hot. If you’ve got air-conditioning, now’s the time to use it — but running it nonstop can lead to sky-high energy bills. Thankfully, there are smart, cost-effective ways to keep cool while cutting AC costs.

What’s the Best Temperature to Set Your AC?

According to the U.S. Department of Energy, the key is finding a balance: stay safe and comfortable while minimizing energy use. Try to reduce the difference between indoor and outdoor temperatures to avoid overworking your AC.

Energy Star, a federal program that promotes energy efficiency, recommends setting your thermostat to 78°F when you’re home and awake during summer.

But most people keep it cooler — a 2021 Consumer Reports survey found the average central AC setting was 72°F, with very few going above 76°F.

If you can, try setting your thermostat 4 degrees warmer while sleeping, especially if the outdoor temperature drops overnight. Using a programmable thermostat can make this easier and more automatic.

Also, make sure your thermostat isn’t placed near hot windows or cold air sources — location can affect how it reads the room and how often your system turns on.

What Temperature Should I Use When I’m Away?

Leaving the house? Let your AC rest, too.

The Department of Energy suggests setting your thermostat 7 to 10 degrees warmer when you’re away. If you do this for just 8 hours a day, it could cut your cooling costs by up to 10% a year.

More Easy Ways to Keep Your Home Cool

Beyond adjusting your thermostat, these small changes can make a big difference:

• Block out heat: Sunlight pouring in through windows is a major source of indoor heat. Use curtains or shades to keep it out.

• Seal air leaks: Check around windows, doors, and baseboards. Use caulk or weather stripping to seal gaps and keep cool air in.

• Limit heat from appliances: Skip the oven and try not to use the stove during the hottest parts of the day.

• Use fans wisely: Fans help move air around but don’t lower the temperature — and they won’t prevent heat-related illness. They can make you feel cooler while you're in the room, but always turn them off when you leave.