2. Know what appliances use what power and how much
Electric heaters (oil, column, panel, fan, ceramic and radiant) are notorious for being the most expensive to run. Gas heating (ducted and convention) often comes in second, while the most energy efficient is usually reverse cycle air conditioning on heat mode.
Take a look at what heating you use in your house and follow these steps to figure out the cost to run them per hour – then you know how much you’re spending per hour of use!
If you have an electric heater
1. Check out your appliance wattage on the sticker
2. Take the wattage and divide by 1000 to change it to kilowatts
3. In the app head to the menu section and click on ‘Your rates’ to find your c/kWh usage rate.
4. Take that rate and multiply it by the kilowatt. Then divide the result by 100 to change from cents to dollars.
Did you follow that? Here's an example:
1. Check the wattage | 2400 watts
2. Convert to kW | 2400 ÷ 1000 = 2.4 kilowatts
3. Check your rate | 22.16 c/Kwh
4. Rate x kilowatts | 22.16 x 2.4 = 53.16 ÷ 100 = 0.53
Cost per hour to run | $0.53
If you have a gas heater
1. Check the usage on the label (this should be MJ).
(Extra) If it’s listed in joules (J/h), divide it by 1,000,000 to convert to megajoules (MJ).
2. Head to the menu section in your app and click on ‘Your rates’ to find your c/MJh usage rate
3.Take that rate and multiply it by the megajoule. Divide by 100 to get that in dollars.
Here's an example:
1. Check the label | 25MJ
2. Check your rate | 1.81 c/MJ
3. Rate x MJ | 1.81 x 25 = 45.25 ÷ 100 = 0.45
Cost per hour to run | $0.45
Please note that these calculations don’t include your daily supply charge. Calculations will vary depending time of use tariffs.
If you’re in the market for a new heater, always check out the energy efficiency rating. If this isn’t listed, have a look for the energy input figure. You can then determine how much it costs to run the heater per hour from our handy calculation above!