Heat pumps are the most popular home heating and cooling solution in NZ — efficient, versatile, and increasingly affordable. Here's what heat pump installation costs in NZ in 2026, how to choose the right size, and what to look for in an installer.
Heat Pump Installation Cost NZ 2026
| System type | Typical installed cost |
|---|---|
| Wall-mounted (single room, 2.5–3.5kW) | $1,800–$3,000 |
| Wall-mounted (medium room, 4.0–6.0kW) | $2,200–$3,800 |
| Wall-mounted (large room, 7.0–9.0kW) | $2,800–$4,500 |
| Floor console (2.5–6.0kW) | $2,500–$4,200 |
| Ducted system (whole home, 3–4 bedroom) | $8,000–$20,000 |
| Multi-split (2 indoor units, 1 outdoor) | $5,000–$9,000 |
| Multi-split (3–4 indoor units) | $8,000–$15,000 |
All prices include supply, installation, and commissioning. GST inclusive. Auckland 10–20% above these figures.
What Affects the Cost
Unit size (kW capacity): Larger capacity units cost more. Getting the right size matters — oversized units short-cycle (turn on and off frequently) and undersized units run continuously without reaching target temperature.
Brand: Mitsubishi Electric, Daikin, and Fujitsu are the top three NZ brands and command a price premium. Panasonic, Haier, and Samsung are mid-tier. Budget brands exist but servicing support in NZ is limited.
Installation complexity: Single-storey install with easy outdoor unit placement: straightforward. Multi-storey with long refrigerant line runs, difficult outdoor unit placement (roof mount, elevated bracket), or existing electrical upgrade required: adds $300–$1,500.
Electrical work: Some installs require a new dedicated circuit from the switchboard ($200–$600 extra). Older homes may need a switchboard upgrade — your installer will flag this.
System type: Wall-mounted single-split is cheapest. Ducted (whole-home) is significantly more — but heats every room from one system.
What Size Heat Pump Do I Need?
A rough guide for NZ homes — actual sizing should be calculated by your installer based on insulation, ceiling height, window area, and climate zone:
| Room size | Recommended capacity |
|---|---|
| Small bedroom (up to 15m²) | 2.0–2.5kW |
| Standard bedroom (15–20m²) | 2.5–3.5kW |
| Lounge / living (20–35m²) | 3.5–6.0kW |
| Large open-plan (35–60m²) | 6.0–9.0kW |
| Very large open-plan (60m²+) | 9.0kW+ or multi-unit |
Climate adjustment: Add 10–20% capacity for Otago, Canterbury, and Southland (cold winters, greater heating load). Subtract 10% for Northland and Auckland (mild winters).
Heat Pump Brands in NZ
Mitsubishi Electric: The market leader in NZ residential. Known for reliability, quiet operation, and strong NZ dealer/service network. HyperCore models operate efficiently down to -15°C — best in cold southern climates. Premium price, premium product.
Daikin: Japan-made, also premium. Excellent energy efficiency ratings, strong NZ service network. Some models specifically designed for cold climates (Daikin Alira X series).
Fujitsu: Popular mid-to-premium brand. Good efficiency, widely stocked across NZ. Often slightly cheaper than Mitsubishi or Daikin for comparable capacity.
Panasonic: Mid-range pricing, good efficiency. Smaller NZ service network than the top three.
Haier / Samsung: Budget-friendly. Fine for mild climates (Auckland, Northland) but less suited to cold southern climates where inverter performance at low ambient temperatures matters more.
For cold climates (Queenstown, Christchurch, Dunedin): Specify a cold-climate heat pump (sometimes called "low ambient" or "hyper inverter"). These maintain heating capacity down to -15°C or lower. Mitsubishi HyperCore and Daikin Alira X are the standouts.
Running Costs
A modern 6kW inverter heat pump running 8 hours/day during winter at an average electricity rate of $0.33/kWh:
- COP (coefficient of performance): 3.0–4.5 for most modern NZ heat pumps (meaning 3–4.5 units of heat per unit of electricity)
- Estimated daily cost: $0.33 × (6kW ÷ 3.5 COP) × 8 hours ≈ $4.50/day
- Monthly winter heating cost: ~$135/month
Compare to a 2kW electric panel heater at the same hours: $0.33 × 2kW × 8 hours = $5.28/day — less total heat output but higher cost.
Heat pumps are 2–4× more efficient than direct electric heating. The payback vs panel heaters is typically 3–5 years.
Certified Heat Pump Installers in NZ
Heat pump installation involves refrigerant handling, which requires a Refrigerant Handling Licence under the Ozone Layer Protection Act. Electrical connection requires a registered electrician.
What to look for: - Refrigerant handling licence (required by law) - Registered electrician or works with one - Manufacturer-authorised installer (access to full warranty, typically 5–6 years for authorised install vs 1–2 years non-authorised) - Local company for warranty service
Getting quotes: 1. Tell the installer your room size (m²), ceiling height, insulation status, and preferred brand 2. Ask them to calculate the right capacity — don't just ask for a 6kW unit without them sizing it 3. Get 2–3 quotes — prices vary meaningfully between installers for the same unit
Find heat pump installers near you: Heat Pump Installers NZ | Post Your Job Free
Frequently Asked Questions
How much does it cost to install a heat pump in NZ? A wall-mounted heat pump for a medium room (4–6kW): $2,200–$3,800 fully installed including GST. Whole-home ducted system: $8,000–$20,000. The most common single-room install (lounge, 6kW Mitsubishi or Daikin) runs $2,500–$3,500.
What is the best heat pump brand in NZ? Mitsubishi Electric is the market leader and most serviced brand in NZ. Daikin and Fujitsu are excellent alternatives. For cold climates, specify a cold-climate (hyper inverter or low-ambient) model — Mitsubishi HyperCore and Daikin Alira X are standouts.
How long does heat pump installation take? Most single-split wall installations: 3–5 hours on the day. Multi-splits or ducted systems: 1–2 days. You'll need to be home for the install, and the home is habitable throughout.
Do heat pumps work in cold NZ winters? Modern inverter heat pumps work well down to -10°C to -15°C (cold-climate models). Standard heat pumps can lose efficiency below 0°C. For Queenstown, Dunedin, Christchurch and Central Otago, specify a cold-climate model — don't assume the cheapest option will heat adequately on the coldest winter nights.
Is a heat pump more efficient than a gas heater? Yes, in terms of energy cost per unit of heat. Modern heat pumps achieve COP 3–4.5 (3–4.5 units of heat per unit of electricity). Gas heaters are at best 90% efficient (0.9 units of heat per unit of gas energy). With current NZ gas and electricity prices, heat pumps are typically cheaper to run than gas — and they also provide cooling in summer.
Related: Heat Pump Sizing Calculator | Heat Pump Installers NZ | Post a Job Free