Measure volume
Width × length × ceiling height gives the room volume in cubic metres.
Heat Wave Solutions
What size heat pump might I need?
Use this Auckland guide to estimate the heating capacity for a room, whole home or multiple rooms. It is a starting point for a professional assessment, not a final equipment specification.
Auckland sizing guide
Start with the space you want to heat.
Heat Wave uses room volume, insulation and Auckland’s 2°C winter design condition to create an indicative heating-load estimate. The result is shown in kW at the design condition, not as a manufacturer’s 7°C rated capacity.
Indicative heating requirement2.8 kWat Auckland’s 2°C design condition
Indicative ducted heating requirement5.0 kWat Auckland’s 2°C design condition
Combined indicative heating requirement2.1 kWEach room should still be checked for system design.
Important: This is a transparent planning estimate based on public NZ heat-loss guidance. Final sizing must consider windows, orientation, draughts, room layout, insulation condition and the selected unit’s output at Auckland’s design temperature. Request a professional assessment.
How the estimate works
A simple, explainable calculation
Apply insulation
Auckland starting factors range from 45 to 60 watts per cubic metre for a single room.
Check the system
We confirm the final model and installation after assessing the space and equipment performance.
Let's talk
Need help with your system?
Tell us what you need and we'll discuss the next step.