Heat pump guide · 23 September 2026
Start with the space you want to heat
Choosing a heat pump is about more than picking the largest unit in a price range. Start with the rooms you want to heat or cool, how often they are used and whether you need one main living area, several rooms or a whole-home solution.
1. Get the size right
The right capacity depends on room dimensions, ceiling height, insulation, glazing, layout and your local climate. A unit that is too small can struggle during colder weather; one that is significantly oversized may cycle on and off too often. Use our heat-pump size calculator for an indicative starting point, then have the final size assessed for your property.
2. Choose a system type that fits the home
A single-split heat pump is often suitable for one main room. Multi-split systems can serve several rooms from one outdoor unit, while ducted systems may suit a larger home where discreet, whole-home distribution is needed. Our heat-pump service page explains the installation, servicing and repair support we provide.
3. Check placement and efficiency
Indoor airflow, outdoor-unit clearance, access for maintenance and the location of windows and doors all matter. Compare registered models using their efficiency information, but remember that performance also depends on correct sizing, positioning and installation.
4. Plan for the long term
Ask about filters, servicing access, expected use and any rooms that may need separate heating. EECA notes that heat pumps can provide heating and cooling efficiently, but good design and installation are fundamental to performance.
Talk through your options
A calculator is useful for planning, not a final equipment specification. For advice based on your layout and requirements, contact Heat Wave Solutions to discuss the next step.
Sources: EECA: Choose an efficient heat pump and EECA good-practice installation guide. Information is general and does not replace a site assessment.