Air Conditioner Use: When is it Most Energy Efficient to Turn it On or Off?

When battling high temperatures, the question of how to operate air conditioners most efficiently often arises. For many modern inverter air conditioning units, frequently turning them off and on while you are in the room is generally not the most economical approach, according to experts.

Instead, it is often more efficient to set a moderate temperature and allow the device to maintain it. The inverter technology allows the compressor to reduce its speed and consume only the energy necessary to keep the set temperature. This contrasts with older models that cycle on and off completely. Constantly switching the unit off and then back on at full power forces it to re-cool not only the air but also the heated walls, floors, and furniture, leading to higher energy consumption and less consistent comfort.

However, this does not mean the air conditioner should run continuously when the home is empty. Experts suggest reducing cooling when no one is present. If you are stepping out briefly, setting the temperature to around 27 or 28 degrees Celsius is advisable. For longer absences, such as a workday, it is more economical to turn the unit off or program it to switch on shortly before your return.

A common mistake is setting the thermostat to very low temperatures, such as 16 or 18 degrees Celsius, with the belief that it will cool the room faster. Experts clarify that this does not necessarily speed up the cooling process but rather causes the unit to operate at maximum capacity for an extended period. A comfortable temperature for most people typically falls between 24 and 26 degrees Celsius. Additionally, energy consumption can be further reduced by closing blinds and windows, ensuring doors are shut, and ventilating the space during cooler early morning or late evening hours. Regular cleaning of air filters is also crucial, as dust buildup impedes airflow and forces the unit to work harder.