Heat Pump Size Chart
To use the chart, simply measure your room’s length and width to calculate its floor area (length x width = Meters Squared M2).
Refer to the map on this page to identify which region (Coloured Zone) in New Zealand you're located in, as this affects the heating/cooling capacity needed due to climate differences.
The chart below shows the recommended Heat Pump size (in kW heating capacity) for your room’s dimensions and location.
If you have any questions, or need assistance with choosing the perfect Heat Pump, feel free to reach out to us—we’re here to help!
Size Chart
Room Size Length x Width.(m2) |
Average NZ Room Type |
Upper North Island(Blue Zone) |
Mid NZ(Green Zone) |
Lower South Island(Red Zone) |
5 |
Single Bedroom |
2.0-2.5 |
2.0-2.5 |
2.0-2.5 |
10 |
Single Bedroom |
2.0-2.5 |
2.0-2.5 |
2.0-2.5 |
15 |
Double Bedroom |
2.5-3.5 |
2.5-3.5 |
2.5-3.5 |
20 |
Large Double Bedroom |
2.5-3.5 |
2.5-3.5 |
3.7-4.0 |
25 |
Small Lounge |
3.7-4.0 |
3.7-4.0 |
3.7-4.0 |
30 |
Medium Lounge |
3.7-4.0 |
3.7-4.0 |
4.2-5.4 |
35 |
Medium Lounge |
4.2-5.4 |
4.2-5.4 |
5.1-6.0 |
40 |
Large Lounge |
5.1-6.0 |
5.1-6.0 |
6.0-6.5 |
45 |
Large Lounge |
6.0-6.5 |
6.0-6.5 |
6.6-7.0 |
50 |
Open Plan Space |
7.5-8.0 |
7.5-8.0 |
7.5-8.0 |
55 |
Open Plan Space |
8.0-8.5 |
8.0-8.5 |
8.0-8.8 |
60 |
Large Open Plan Space |
8.6-9.0 |
8.6-9.0 |
8.8-9.2 |
65 |
Large Open Plan Space |
9.1-9.5 |
9.1-9.5 |
9.3-9.6 |
70 |
Large Open Plan Space |
9.6-10.0 |
9.6-10.0 |
9.7-10.0 |