The U.S. Department of Energy recommends setting the central air thermostat to 78 degrees Fahrenheit during the summer months to conserve energy and reduce energy costs. When a home is unoccupied, raising the thermostat to a temperature of 82 F to 85 F can further reduce energy costs.
The operating cost for central air conditioners increases up to 8 percent for every degree the thermostat is lowered. If 78 F is too warm, especially on the hottest days of summer, set the thermostat as high as possible while maintaining a comfortable temperature. Using a programmable or "smart" thermostat can help take the guesswork out of home cooling needs by raising and lowering temperatures at predetermined times throughout the day.Learn More
Using whole-house attic fans helps to reduce the costs of air conditioning when outside temperatures are below the normal thermostat setting inside the house. The most efficient use involves shutting off the fan and closing windows before daytime heating increases outside temperatures.Full Answer >
A 1200 square foot home needs a 23,000 BTU central air conditioning system. It is very important to choose the correct capacity air conditioning system for a home.Full Answer >
During cooling season, setting the thermostat to 78 degrees Fahrenheit when at home and 85 when away offers greater energy efficiency. The California Energy Center reminds consumers they save 1 to 3 percent for each degree they increase the thermostat above 72 degrees during the cooling season.Full Answer >
During the warmer months, the thermostat to an air conditioner should be set at 78 degrees Fahrenheit. If this is not comfortable, some experts recommend lowering the temperature to no less than 74 degrees to avoid high utility costs.Full Answer >