Heater sizing calculator

Answer the questions below to work out approximately what size heater you need. Every house is unique and the results of this tool may not be exact for your home. 

Remember that heaters are much more cost effective if your rooms are insulated.  We recommend that you get your heater installed by a professional.

Find the right sized heater for your needs

Northland Auckland Coromandel Hamilton Bay of Plenty Rotorua Taupo New Plymouth East Coast Wellington Nelson/Marlborough West Coast Christchurch Central Otago Queenstown Lakes Dunedin Invercargill
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(as a % of wall area)

Heat Output

0kW
Approximate size of heater required for your room (in kilowatts)

Temperature

0°C
If you are choosing a heat pump, check that it can reach the heat output (the number in the orange box above) at the temperature in the blue box, which is around the lowest outdoor temperature you regularly get in winter in your region. If you are not sure, ask your salesperson.