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Comparative Running Costs of Cooling Systems


Floor area Approximate hourly running cost
Room cooling
Refrigerative Split-System 40 mē 23 to 30 cents per hour
Evaporative Fixed Wall System* 30 to 50 mē 4 cents per hour
Whole of home cooling
Ducted Refrigerative System 150 mē 80 c to $1 per hour
Ducted Evaporative System* 150 mē 10 to 15 cents per hour
* Water consumption costs not included.

The figures are indicative costs for systems running on maximum setting for an hour. Actual costs will be lower if the air conditioner cycles on or off due to the thermostat or if a low power setting is used.