How to Use Air Conditioner Efficiently

Running your air conditioner efficiently can cut your electricity bill significantly while keeping your home comfortable. This guide covers the best practices, settings, and tools to help you get the most out of your AC unit.

1. Set the Right Temperature

The U.S. Department of Energy recommends setting your thermostat to 78°F (26°C) when you're home and higher when you're away. Every degree lower can increase energy consumption by 3–5%. Avoid setting it too low thinking it will cool faster — it won't, but it will cost more.

2. Use a Smart Plug or Timer

One of the easiest upgrades you can make is adding a smart plug to your window or portable AC unit. This lets you schedule the AC to turn on 30 minutes before you get home, so you're never cooling an empty house.

The GHome Smart Plug works with Alexa and Google Home, supports scheduling via app, and requires no hub — just plug in and connect to your 2.4GHz Wi-Fi. Simple and effective.

If you also want to track exactly how much electricity your AC is consuming, the Govee Smart Plug with Energy Monitoring is a great choice. It shows real-time power usage in the app, so you can see exactly what your AC costs per day.

3. Block Out Heat with Thermal Curtains

Up to 30% of unwanted heat enters your home through windows. Keeping blackout or thermal curtains closed during the hottest part of the day (typically 10am–4pm) can reduce the load on your AC dramatically.

The ChrisDowa Grommet Blackout Curtains are thermal insulated, room-darkening, and come in a 2-panel set — a practical and affordable way to keep heat out and cool air in.

4. Keep Filters Clean

A dirty filter forces your AC to work harder, consuming more energy and reducing cooling efficiency. Check your filter every 30 days and replace it every 60–90 days depending on usage. The Amazon Basics MERV 8 Air Filters (6-Pack) are a reliable, affordable option for standard AC and furnace units.

5. Use Ceiling Fans Together with AC

Running a ceiling fan alongside your AC allows you to raise the thermostat by about 4°F without sacrificing comfort. Fans create a wind-chill effect that makes the room feel cooler. Just remember to turn fans off when you leave the room — fans cool people, not rooms.

6. Seal Gaps and Insulate

Cool air escaping through gaps around doors and windows forces your AC to run longer. Check for drafts and seal them with weatherstripping or door draft stoppers. This is especially important for window AC units where the installation gap can let warm air in.

7. Schedule Regular Maintenance

Have your AC serviced once a year — ideally in spring before the cooling season begins. A well-maintained unit runs more efficiently and lasts longer. Between professional services, clean the coils and drain line yourself (see our guides on AC cleaning).

8. Avoid Heat-Generating Appliances During Peak Hours

Ovens, dryers, and dishwashers generate significant heat. Running them in the early morning or late evening reduces the cooling load on your AC during the hottest part of the day.

Quick Tips Summary

• Set thermostat to 78°F (26°C) when home
• Use a smart plug to schedule AC operation
• Close thermal curtains during peak sun hours
• Replace filters every 60–90 days
• Use ceiling fans to supplement cooling
• Seal gaps around doors and windows
• Service your AC annually

Small changes in how you use your air conditioner can add up to big savings over a summer. Start with a smart plug and thermal curtains — two of the easiest and most impactful upgrades you can make today.