When summer hits and the AC kicks on, many homeowners worry about rising energy bills. Fortunately, window air conditioner offer one of the most energy-efficient ways to cool a single room. But not all units are created equal. Here’s what you need to know to maximize energy savings with a window AC.
Look for the Energy Star Label
Window air conditioners that carry the Energy Star certification meet strict efficiency guidelines set by the U.S. Environmental Protection Agency. These models use up to 10% less energy than non-certified units without compromising performance.
Understand EER and CEER Ratings
EER (Energy Efficiency Ratio): Measures cooling capacity (BTUs) divided by power consumption (watts). Higher = better.
CEER (Combined Energy Efficiency Ratio): A newer, more accurate measurement that includes standby and operational power use.
Always choose a model with a high CEER rating for long-term savings.
Use Built-in Timers and Thermostats
Most modern window ACs include a programmable timer, thermostat, or both. These features help you avoid overcooling and running the unit unnecessarily.
Set the AC to turn off when you're out.
Use the “eco” or “energy saver” mode if available.
Insulate and Seal the Room
Even the most efficient AC will waste energy if your room isn’t sealed properly.
Use weather-stripping or foam to seal around the unit.
Close doors, windows, and blinds during peak heat hours.
Block sunlight with blackout curtains to reduce heat gain.
Use Fans to Support Circulation
Pair your AC with a ceiling or oscillating fan to help distribute cool air more evenly throughout the room. This allows you to raise the thermostat a few degrees while maintaining comfort.
Unplug When Not in Use
Some units draw power even when turned off. Use a smart plug or power strip to cut off electricity completely when the unit is idle for extended periods.
