At home

Evaporative coolers

Generally more suitable for regions where humidity is low, evaporative coolers work by cooling and filtering the air.

The types available include portable units (suitable for small rooms up to 25 m2), fixed room units located in an external wall or window (suitable for open areas 30-50 m2), and ducted central systems that are installed in the roof and suitable for whole-home cooling.

For evaporative coolers to function effectively, some windows and doors must be left open so the moist air can be exhausted from the home.

Get the most out of your cooler

  • Site the unit on the side of the house that receives the prevailing hot winds. This avoids too much heat leaking in from the open windows and doors that exhaust the air.
  • On days of high humidity, the highest fan speed should be used. On very humid days, turn off the water supply to the cooler and run the fan only.
  • Water consumption for evaporative coolers depends on the humidity of the day.
  • Evaporative coolers do not work on a thermostat. They run for as long as you leave them on.
  • During winter, ducted units on the roof should have covers placed over them and ceiling vents closed to reduce heat loss.

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Page last updated: 10 December 2015