Pages Navigation Menu

6 Tips to Understand the Ideal Air Conditioner Temperature to Save on Electricity Bills

6 Tips to Understand the Ideal Air Conditioner Temperature to Save on Electricity Bills

airconAlthough air conditioners have become a necessity in households, everyone owning an aircon knows that it’s going to add to the energy bill. However, while cooling does consume plenty of electricity, you can take effective steps to reduce the bills. While one of these things is regular aircon servicing, the other is to maintain the right temperature for the air conditioner.

1. How does an Aircon Work?

Most people don’t know how an aircon works. For them, it just starts throwing cool air out once it’s switched on and a temperature is set. Actually an aircon takes the indoor air, cools it down by passing it through evaporator coil and then throws it back in the room.

2. How does a Thermostat Work?

If the thermostat is set at 18°C, will the aircon cool the room sooner than if set at 25°C? No. The job of the thermostat is to check the temperature of the indoor air and stop the compressor upon reaching the desired temperature. This means that compressor can work longer if the temperature is set to a lower level and eventually will use more electricity. This is due to the fact that less time will be taken for air to reach a high temperature than a low temperature as the compressor works with the same wattage or power.

3. What Happens when the Compressor Stops?

When the compressor stops and thermostat reaches the temperature level you need, the aircon simply blows the fan. In this situation, the consumption of electricity is not for the compressor, but only for the fan which is running. The compressor will restart when the thermostat finds that the temperature has risen again from set levels. Compressor is the component of the aircon that consumes most of the electricity.

4. Factors Affecting Electricity Consumption of Aircon

There are 4 such factors:

  1. Outdoor air temperature
  2. Indoor temperature
  3. Temperature setting of the aircon
  4. Thermal insulation of the room

If there is a huge difference between the desired temperature and indoor/outdoor temperature, the air conditioner will need a lot more electricity to cool the indoor air to bring its temperature down to the desired level because the compressor will run for longer. If the temperature is set at 18°C and outdoor temperature is 38°C, a lot more electricity will be needed than when thermostat temperature is 24°C and outdoor temperature is 38°C. According to a study by American Council of Energy Efficiency Economy (ACEEE), rise of each °C can save 3-5% of electricity units consumed. This can significantly reduce the consumed units per month in the electricity bill.


5. Ideal Temperature to be Set on Thermostat

However, increasing the temperature won’t reduce the comfort level. Actually, as per the American Society of Heating, Refrigeration and Air Conditioning Engineers (ASHRAE), the ideal temperature for comfort is from 23.5°C to 25.5°C in summers (this again depends on many factors). Therefore setting the temperature to 24°C provides good comfort and reduces electricity bill. Using ceiling fans together with aircons can further help in increasing the thermostat temperature.

6. Does the “Quick Cool” Option in Aircons Help?

The Quick Cool option sets the aircon temperature to 16°C or 18°C which means that the compressor stops only when indoor temperature attains this level. However, while dropping from 35°C or 40°C, it would have definitely crossed 24°C which is a comfortable temperature. Thus, the Quick Cool option is of no use since more electricity is used to bring the temperature down to 18°C whereas compressor would have stopped if the temperature was set at 24°C, thus consuming less electricity.

Quick Cool

Perform regular aircon servicing and use these tips and you can save a lot on your electricity bills and get real relaxation in the cool air of your aircon.

Recent Posts