As temperatures rise across much of the United States, many homeowners are seeking ways to stay cool while keeping energy costs under control. The U.S. Department of Energy provides guidance on thermostat settings and other efficiency strategies to maximize comfort and minimize expenses. Vicky Nguyen, NBC News chief consumer investigative correspondent, highlighted these recommendations, suggesting a thermostat setting of 78°F as the most efficient for air conditioning during peak heat hours. While this may feel warm to some, it's designed to optimize energy usage. Additionally, Nguyen shared several supporting tactics such as adjusting temperatures higher when away, using ceiling fans effectively, sealing home gaps, and managing appliance use to further reduce energy consumption.

Efficient Cooling: Setting Thermostats for Maximum Savings

One of the key strategies for reducing cooling costs during hot weather is maintaining an optimal indoor temperature. According to the U.S. Department of Energy, setting your thermostat between 75 and 78 degrees Fahrenheit during the day helps balance comfort with energy efficiency. When leaving the house unoccupied, increasing the temperature by about seven degrees can significantly cut down on unnecessary energy use. Vicky Nguyen, who follows this advice at home, keeps her thermostat around 77°F, though she admits her family occasionally finds it too warm. She also adjusts the temperature lower when guests visit, showing how flexibility can be applied without compromising efficiency entirely.

The idea behind this approach is to prevent the air conditioning system from overworking, which in turn lowers electricity bills and prolongs the life of the unit. By allowing indoor temperatures to rise slightly, especially when no one is present, homeowners reduce the workload on their HVAC systems. This method aligns with broader energy-saving goals and supports environmental sustainability. While some may initially find a setting of 78°F uncomfortable, acclimating to slightly warmer conditions can make the adjustment more tolerable over time. Additionally, smart thermostats can automate these changes, ensuring that homes return to preferred temperatures just before residents come back, offering both convenience and cost savings.

Additional Energy-Saving Tactics Beyond Thermostat Adjustments

Beyond thermostat settings, there are numerous strategies to enhance energy efficiency during heat waves. Closing curtains and lowering blinds helps block out direct sunlight, reducing indoor heat gain. Ceiling fans should be set to rotate counterclockwise to push cool air downward, but they should be turned off when rooms are unoccupied to avoid wasting electricity. Conducting an energy audit by checking for air leaks around windows and doors can identify areas where sealing improvements can make a significant difference. Regular maintenance, such as cleaning or replacing air filters every one to two months, ensures that cooling systems operate efficiently without unnecessary strain.

In addition to structural and mechanical adjustments, behavioral changes can further impact energy consumption. Unplugging electronics when not in use prevents "phantom loads," which drain power even when devices are off. Running appliances like washing machines and dishwashers only when fully loaded reduces water and electricity waste. Lowering the water heater temperature to 120°F, as recommended by safety agencies, contributes to both energy conservation and safety. Personal habits such as taking shorter showers and using cold-water laundry detergents also play a role in reducing overall household energy use. These cumulative actions create a comprehensive strategy for staying cool responsibly while managing costs during extreme heat events.