How to Save Electricity on Central AC Units

Properly maintaining central air conditioning units helps with energy efficiency.

A central air conditioning unit is energy efficient and can save you more money on the electric bill than having individual air conditioning units placed at the window or in the wall of each room, according to the U.S. Department of Energy. Properly maintaining the central air conditioning unit and programing the thermostat are also ways in which one can see savings on the electric bill. Ensure your central air conditioning unit runs efficiently with specific maintenance techniques and bring in a HVAC professional for appropriate repairs and installation.

Step 1

Remove the air filter and vacuum off any dirt and dust on a monthly basis. Clean air filters help your central air conditioning unit run more efficiently.

Step 2

Hire an HVAC (Heating, Ventilation and Air Conditioning) professional to check for leaks and to correct problems. Leaks at the air ducts or peeling insulation wastes energy and may create an imbalance of temperature between rooms.

Step 3

Hire a professional to help establish a zoning system. A zoning system allows you to control the central air conditioning to a particular floor level and rooms. This helps eliminate the waste of energy for cooling areas not occupied.

Step 4

Program the thermostat to a higher temperature and use a ceiling or ordinary fan to help circulate the air. You can save one to three percent in energy cost for each increased degree from 72 degrees Fahrenheit, according to the California Energy Commission. In general, 78 degrees Fahrenheit is comfortable for the average individual.


Some air filters are not reusable. Check original packaging information or instructions for details.

Use shades and blinds to reduce heat buildup from direct sunlight.