Are you looking to keep your home cool this summer without heating up your utility bills? Then check out the Home Cooling section of the Home Energy Guide (pdf), a Minnesota Commerce Department publication that can help you reduce your home's energy use and save money.

The Home Energy Guide explains how air conditioning systems work, the importance of good maintenance and the benefits of high-efficiency units. It also offers a range of ideas to reduce heat and humidity in your home and lighten the demand on your AC system.

Annual checkup

Proper maintenance of your AC system will improve its safety and performance, reduce energy use and prolong its useful life. 

AC systems should be professionally inspected each year. A typical central AC system inspection covers tasks such as checking voltage and belt condition, washing condensing unit coils, checking the drain line and ensuring proper airflow.

Contractors tend to be very busy in the summer, so book your AC inspection early. 

Maintenance

Between annual checkups, you can also take steps to keep your AC operating efficiently and safely. 

One key maintenance task is to routinely replace or clean the AC filter. A clogged, dirty filter blocks normal airflow and impairs a system’s efficiency. 

A central AC filter is usually located in the return duct near the furnace or air handler, while a room AC has a filter mounted in the grill that faces into the room. 

Clean or replace the filter according to the manufacturer’s recommendations. More frequent attention may be needed if the AC is in constant use or the home has high levels of dust or animal fur.

Other do-it-yourself AC maintenance tips include:

Keep the area around the outside unit free of foliage or anything that can block airflow.

Spray the outside unit's coils with water if they are clogged with leaves, dust or other debris that reduce efficiency.

Keep a window unit's drain lines clear and away from siding, and make sure the spaces between window and unit are sealed.

Ductless and high-velocity systems also have filters that need cleaning or replacing.

Utility incentives

Check with your utility for cooling tips and ways to save on your electric bill. Some utilities offer energy-saver programs with lower rates for off-peak AC use, and many provide rebates if you install a new high-efficiency AC system.

Resources

Some resources to help you cool your home while saving energy include:

• Home Energy Guide (pdf) from the Minnesota Commerce Department
• “Home Cooling” from the U.S. Department of Energy
• “Maintaining Your Air Conditioner” from the U.S. Department of Energy

Minnesota Energy Tips is provided twice a month by the Minnesota Department of Commerce, Division of Energy Resources. Contact the division’s Energy Information Center at energy.info@state.mn.us or 800-657-3710 with energy questions.