How to Save Energy with Air Conditioning (Best Temperature Settings)

Air conditioning is often the biggest part of a summer electric bill. A few smart changes can cut that cost significantly while keeping you comfortable.

The best temperature setting

The sweet spot for efficiency is around 24–26°C (75–78°F). Every degree cooler can increase energy use by roughly 6–8%.

Raising your thermostat by just 1–2 degrees is the single easiest way to lower your cooling bill.

Habits that save energy

1. Use a fan with your AC. Fans let you feel comfortable at a higher thermostat setting.
2. Close blinds during the day to block heat from the sun.
3. Clean or replace filters — a clogged filter makes the AC work harder.
4. Don’t cool empty rooms. Close vents or doors where you can.

Use a programmable thermostat

Set the temperature higher when you’re asleep or away, and have it cool down shortly before you return. This avoids cooling an empty home.

Seal the cool air in

Check for gaps around windows and doors. Sealing leaks keeps cool air inside and stops your AC from running constantly.

How much can you save?

FAQ

Is it cheaper to leave the AC on all day? Usually no. Turning it up (not fully off) while you’re out generally saves more than maintaining a cold house.

Does closing vents in unused rooms help? It can, but don’t close too many at once — it can strain some systems. Focus on doors and blinds first.

Conclusion

Set your thermostat to 24–26°C, pair it with fans, block the sun, and keep filters clean. These habits cut cooling costs without sacrificing comfort.