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Best aircon temperature and modes explained

The ideal temperature for summer, winter and sleeping, and what Cool, Dry, Heat, Fan, Auto and Sleep modes actually do.

The right settings make your aircon more comfortable and cheaper to run. The most common mistake is setting it very low to cool the room faster — it doesn’t work that way.

The best temperature

  • Summer cooling: 24–25 °C. Every degree cooler adds noticeably to the running cost — often quoted as 5 to 10% per degree.
  • Sleeping: 24–26 °C with Sleep mode, which lets the temperature rise gently overnight.
  • Winter heating: 20–22 °C.

The modes

ModeWhat it doesUse it when
CoolCools to the set temperatureHot days
DryRemoves moisture with gentle coolingHumid, muggy days — especially at the coast
HeatWorks as a heat pumpCold days; much cheaper than an electric heater
FanMoves air without coolingMild days; uses very little electricity
AutoChooses cooling or heating for youSpring and autumn
Sleep / EcoQuieter, adjusts the temperature slowlyNight time
Turbo / PowerfulMaximum output for a short timePulling down a hot room quickly

Does setting the aircon to 16 °C cool the room faster?

No. The aircon cools at the same rate whatever temperature you set — a low setting just keeps it running until the room is far too cold, using more electricity. Set the temperature you want and use Turbo mode if you need it quicker.

Should I point the louvres up or down?

Up or horizontal when cooling, because cool air sinks; down when heating, because warm air rises.

What is the difference between Dry and Cool mode?

Dry mode concentrates on removing humidity with gentle cooling, so the room feels comfortable without getting cold. Cool mode targets the set temperature.

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