How to Lower Your Summer Cooling Costs

June 1, 2026

Your AC bill last month was $287. The month before? $312. You turned down the thermostat thinking it would help, but now you're sitting in a cold house and your electric company is still getting rich.

Ready to cool smarter, not harder? Call 919-271-7961 or schedule an energy assessment.

The truth is, most people are running their AC inefficiently—not because they're careless, but because no one tells them how to actually manage it. Here are the moves that work.

Set Your Thermostat Right

The first fix is the thermostat. Most people set it and forget it.

For daytime when you're home: 76-78°F is the sweet spot. Every degree below that costs roughly 3% more in electricity. So if you're running 72°F instead of 78°F, you're spending an extra 18% on cooling.

If you're away during the day, set it to 82°F. Your house won't get destroyed in eight hours, and you'll save a lot of money.

At night, bump it up to 78°F before bed. Yes, it's a little warmer, but sleeping under a light blanket is cheaper than running the AC hard all night.

If you're not doing this already, you're leaving money on the table.

Manage Your Airflow

A lot of people close vents in rooms they don't use. This seems logical—why cool a closed bedroom if nobody's in it? But closed vents actually work against you. They increase pressure in your system, forcing it to work much harder to cool the rest of the house.

Open all your vents. Instead, close interior doors to isolate rooms you don't need cooled as much. It's a small change, but it lets your system work more efficiently.

Also check your return air vents. They're usually on walls or in the ceiling. Make sure nothing is blocking them—not even curtains or furniture. Blocked airflow forces your compressor to run longer.

Keep Your Filter Clean

This is the easiest money saver and most people skip it. A dirty filter makes your system work significantly harder.

Change your filter every 30 days during cooling season (May through September in the Triangle area). A 16x25x1 filter is inexpensive and easy to replace. That's some of the cheapest maintenance you can do. According to the EPA, regular filter changes improve both efficiency and air quality.

If you have pets or allergies, change it every two weeks. It'll keep your system happy and your air cleaner.

Service Your System

Before summer hits, have Southern Seasons Air come out for a seasonal check. We'll clean your condenser coils, check your refrigerant levels, and make sure everything is running at peak efficiency. A unit running low on refrigerant has to work 50% harder to cool your house.

A reasonably-priced maintenance visit now prevents expensive compressor failure later and keeps your cooling costs normal. Learn more about air conditioning service and why regular tune-ups matter.

Use a Programmable Thermostat

If you don't have one, get one. A basic programmable thermostat is an affordable investment that pays for itself quickly through energy savings.

Set it to higher temps when you're away, lower when you're home. You can also program it differently on weekends. Most people forget to adjust manually—that's where a program thermostat wins. As we've covered in detail, an old thermostat can cost you money without you realizing it.

A smart thermostat (like Nest) is a more significant investment but gives you remote control and learning features. You can adjust it from your phone, and it learns your patterns over time.

Close Your Blinds and Curtains

Solar heat gain is real. If you've got south-facing or west-facing windows, close your blinds during the day. Direct sun heating up a room means your AC has to work harder to compensate.

This is especially true in afternoon hours (2-6 PM). Keep those west-facing windows shaded and you'll notice a difference in cooling costs.

Run Your AC During Off-Peak Hours

If you're on a time-of-use rate plan (Duke Energy has these), your electric rates are lower at certain times of day. Check your bill or call your utility.

If rates are cheaper early morning and evening, cool your house hard during those hours (set thermostat lower), then let it drift slightly higher during peak rate hours (typically 2-8 PM).

In Closing

Your cooling bill is high because your system is working harder than it needs to. Most people can cut their AC costs by 15-25% just by adjusting thermostat settings and keeping their system maintained. That's $50-80 a month for a lot of households.

Take time this week to adjust your thermostat strategy and schedule that seasonal maintenance. You'll stay comfortable and keep more money in your pocket.

Ready to lower your cooling costs? Call 919-271-7961 to schedule your seasonal maintenance, or contact Southern Seasons Air. We serve Raleigh, Wake Forest, and Rolesville.