Heat pumps are now the default heating choice for NZ homes — they're typically 3–4× more energy-efficient than electric resistive heating, they cool in summer, and they're significantly cheaper to run than gas. If you're still using a wall heater or fan heater as your primary heat source, upgrading is one of the best financial decisions you can make for a NZ home.
This guide covers what you need to know before buying in 2026.
How Much Does a Heat Pump Cost in NZ?
Installation costs vary by unit size, installation complexity, and city:
| System | Typical cost (installed, inc GST) |
|---|---|
| Small room / bedroom (2–2.5kW) | $2,100–$3,800 |
| Medium room / lounge (3.5–5kW) | $2,800–$5,000 |
| Large open plan (6–8kW) | $3,800–$7,000 |
| Multi-split (2 rooms, 1 outdoor) | $6,000–$10,000 |
| Multi-split (3+ rooms) | $9,000–$18,000 |
| Ducted system (whole home) | $15,000–$35,000+ |
Auckland and Queenstown are typically 10–20% above these figures. Invercargill and smaller South Island cities are 5–10% below.
What Size Heat Pump Do You Need?
This is where most people get it wrong. Undersized: the heat pump runs constantly and doesn't keep up. Oversized: it short-cycles (turns on and off rapidly), reducing efficiency and lifespan.
Rule of thumb for well-insulated NZ homes:
- Bedrooms (10–15m²): 2–2.5kW
- Average lounge (20–30m²): 3.5–5kW
- Open-plan kitchen/dining/lounge (40–60m²): 6–8kW
- Large open plan (60–80m²): 9–12kW
Adjust upward for: high ceilings, poor insulation, south-facing rooms, cold climates (Otago, Southland).
A good installer will do a heat load calculation based on your room dimensions, insulation levels, and local climate — not just give you a number. If they're not asking about your insulation, be cautious.
Which Brand?
The main brands sold in NZ in 2026, roughly by market share:
Mitsubishi Electric — the most widely installed heat pump in NZ. Known for reliability, quiet operation, and strong after-sales service. Slightly premium-priced but proven long-term.
Daikin — second most popular. Strong on energy efficiency ratings. Excellent for larger or more demanding installations. Premium pricing.
Fujitsu — strong mid-range option. Good efficiency, reliable, competitive pricing. Popular with installers for ease of installation.
Panasonic — good energy performance, particularly their Nanoe-X air purification models. Less common but growing.
Samsung / LG / Haier — entry-level to mid-range pricing. Can offer good value but check warranty terms and local service availability carefully.
Avoid: Very cheap imported brands with no NZ service network. A heat pump that breaks in year 3 with no local technician is not a bargain.
Our recommendation: For most NZ homes, Mitsubishi Electric or Fujitsu offer the best balance of reliability, efficiency, and service. Daikin is worth the premium for high-use applications or larger systems.
Running Costs — What to Expect
A heat pump's running cost depends on its efficiency (COP/EER rating), how much you use it, and your power price.
Approximate annual running costs (Auckland, typical home):
- Small room heat pump (2.5kW, 1,500 hrs/yr): ~$400–$600/yr
- Lounge heat pump (5kW, 2,000 hrs/yr): ~$700–$1,100/yr
- Full home ducted (12kW system): ~$2,000–$3,500/yr
Compare this to electric resistive heating (the bar heater type): roughly 3–4× higher for the same warmth. A heat pump typically pays back its purchase price in energy savings within 5–9 years.
Installation — What's Included?
A standard heat pump installation includes:
- Indoor unit (wall or ceiling-mounted)
- Outdoor compressor unit
- Refrigerant pipe installation (typically up to 5–8 metres included)
- Electrical connection from existing circuit
- Commissioning and test
- Basic user walkthrough
Extra costs to ask about: - Longer pipe runs (charged per metre beyond the included length) - New dedicated circuit or switchboard upgrade (if required) - Installation in complex locations (high walls, difficult ceiling access, very long pipe runs) - Consent (rarely required for standard residential, but occasionally necessary)
What to Ask Your Installer
Before signing:
- What size unit are you recommending and why? Ask them to show the heat load calculation.
- Which model specifically? Get the model number so you can check the energy star rating.
- What's the total installed cost including all pipe runs and electrical work?
- Is the electrician on your team licensed? All electrical work in NZ must be done by a licensed electrical worker.
- What warranty does the unit carry? Most brands offer 5–7 years on the compressor; check what your installer offers on the installation itself.
- Are you a registered refrigerant handler? Required by NZ law for anyone handling refrigerants.
Timing
May and June are peak booking periods for heat pump installers. Many experienced installers book out 3–5 weeks in advance during this period.
If you want installation before the worst of winter, book now. If you're flexible, consider booking for August–September when demand drops and pricing may be slightly more competitive.
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