Summer AC Efficiency Tips
Stay cool without breaking the bank
Air conditioning can account for a significant portion of your summer energy bills. The good news is that a few simple habits and adjustments can make a real difference in how efficiently your system runs — and how much you pay each month.
Easy Wins for Better Efficiency
Set Your Thermostat to 78°F When Home
Every degree below 78 increases your cooling costs by about 3-5%. If 78 feels warm, use ceiling fans to create a wind-chill effect — they let you feel comfortable at a higher thermostat setting.
Raise the Temperature When You're Away
Set your thermostat 7-10 degrees higher when you leave for work. A programmable or smart thermostat makes this automatic. You won't cool an empty house, and the system will catch up quickly when you return.
Change Your Air Filter Regularly
A clogged filter forces your AC to work harder, using more energy and wearing out components faster. Check it monthly during heavy use and replace it every 1-3 months.
Keep Vents Open and Unblocked
Closing vents in unused rooms seems logical, but it actually increases pressure in your ductwork and makes the system less efficient. Keep all vents open for balanced airflow.
Use Curtains and Blinds
Close curtains on south and west-facing windows during the hottest parts of the day. Solar heat gain through windows is one of the biggest drivers of cooling load in a home.
Outdoor Unit Care
Your AC's outdoor condenser unit needs attention too. A neglected outdoor unit can reduce efficiency by 10-25%.
- Keep at least two feet of clearance around the unit — trim back bushes, grass, and debris
- Gently rinse the condenser fins with a garden hose to remove dirt and pollen buildup
- Make sure the unit is level — settling can stress refrigerant lines and reduce efficiency
- Never stack anything on top of the unit or use it as a shelf
When to Call a Professional
If you've done everything on this list and your home still isn't cooling well or your bills seem too high, it may be time for a professional evaluation. Common issues that need a technician include:
- Low refrigerant levels (you can't top this off yourself)
- Ductwork leaks losing cooled air into your attic or crawlspace
- An aging system that's lost efficiency over time
- Electrical issues causing the system to short-cycle
Need Help With Your AC?
D. A. Gsell can tune up your system for peak summer performance