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Cost of Heating

The cost of heating in the home at current domestic tariff 15.01c kWh:

Heating Appliances Average Wattage Cost per Hour (cents)
Reverse cycle Air Conditioner Less than 1500 .11c to .21c
(window/wall models and split systems) 1500 to 3000 .21c to .42c
  3200 to 4000 .45c to .56c
  4200 to 5000 .59c to .70c
  5200 to 6000 .73c to .84c
Bar Heaters    
Single bar 750 to 1200 .11c to .17c
Double bar 1500 to 1800 .21c to .25c
Triple bar(with or without a fan) 2400 .34c
Fan Heaters    
Single 1200 .17c
Double 2400 .34c
Oil Heaters    
Small 1000 to 1500 .14c to .21c
Medium 2000 .28c
Large 2400 .34c

Points to note about the costs of heating systems:

The costs of running appliances as listed on this brochure are only approximate. Other factors affect the effectiveness and efficiency of an appliance and as a result the cost of running it. Some of these factors are:

  • The insulation of the room the appliance is operating in
  • How cold the ambient temperature is
  • Whether the appliance has a thermostat
  • Whether the appliance has a high or low setting
  • How old and/or clean and well maintained the appliance is

The more fins an oil heater has the more oil it contains and the longer it retains and radiates heat. The wattage of the unit is also proportionate to the number of fins it has.

Some fan heaters have thermostats. Fan heaters are rated at 2400 watts, on high setting, regardless of their size. Their wattage can be halved although this then reduces their heating capacity as well.

None of these heating appliances except for reverse cycle air-conditioning are sold with energy efficiency star ratings.

Where can I find the wattage rating of the appliance?

Ask your supplier or check on the label of the appliance for details.

COOLmob
Power and Water sponsor COOLmob to provide subsidised home energy audits and water audits. For more information about reducing energy and water consumption and to organise a $10 audit visit www.coolmob.org for Darwin or www.dkacoolmob.org for Alice Springs and Tennant Creek.