Saving Electricity with AC in Summer: 6 Practical Methods That Actually Work

Settings and Usage Habits

Temperature setting is one of the most direct factors affecting AC electricity consumption. Raising the set temperature by one or two degrees reduces the time the compressor needs to run to maintain it. A starting point of 24–26 °C is generally recommended — adjust up or down based on personal comfort rather than defaulting to the lowest setting from the start.

Using a fan alongside the AC circulates air more evenly throughout the room, making the same set temperature feel more comfortable. If the room feels cool enough with the fan running, try raising the AC temperature by one or two degrees.

• Set 24–26 °C and adjust based on comfort
• Use a ceiling or stand fan to improve air circulation
• Turn off or raise the temperature when leaving the room
• Use the timer function to avoid running at full capacity all night

Reducing Heat Entry Into the Room

A key reason AC consumes so much electricity is that outdoor heat constantly enters through glass windows, door gaps and walls, forcing the unit to run continuously at full load. Drawing curtains — especially for west-facing rooms in the afternoon — can significantly cut the heat gain from direct sunlight.

Ensure doors and windows are fully closed to prevent air exchange between the cooled room and warmer spaces. For rooms adjacent to kitchens or other heat-generating areas, try to keep connecting doors closed while the AC is running, or ensure the heat source area has its own exhaust ventilation.

Equipment Condition and Installation Environment

A clogged air filter is a common but often overlooked cause of increased electricity use. Restricted airflow forces the unit to run longer to reach the set temperature. Cleaning the filter regularly restores normal airflow. If a deep clean has not been done in a long time, accumulated dust on the evaporator coil similarly reduces cooling efficiency.

Ensure nothing is blocking the indoor air outlet, allowing cool air to flow freely. The outdoor unit should have clear space around it — no obstructions blocking the heat-discharge grilles. If the unit has significant dust build-up, noticeably reduced airflow, or unexplained increases in electricity consumption, arranging a professional clean and inspection addresses the root cause far more effectively than any single setting change.

Summer AC Electricity-Saving Action List

• Mode confirmed as Cool (snowflake icon)
• Temperature set to 24–26 °C
• Fan in use to improve air circulation
• All doors and windows fully closed
• West-facing curtains drawn in the afternoon
• Air filter cleaned
• No furniture blocking the indoor air outlet
• Outdoor unit cleared of obstructions
• If performance is still poor, arrange a professional deep clean

Frequently asked questions

Is it more economical to leave the AC on all night or set it to switch off?

In general, using the timer function to switch off the AC a couple of hours before you would naturally wake up — letting the room warm naturally in the cooler early morning — tends to be more economical than maintaining a low temperature all night. The actual benefit depends on how well insulated the room is and your sleeping schedule.