Air-to-Water Heat Pump Installation in Dunedin
End the Dunedin chill, the weeping windows, and the diesel bills. Air-to-water heat pumps designed for older Dunedin villas and modern builds alike, sized on real heat-loss calculations and installed by the same person who designs and commissions them.
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Why Dunedin homeowners are switching to air-to-water heat pumps
Dunedin’s climate can be nasty with long winters, damp patches, and homes that lose heat. Older boilers, heat pumps that have given up, or heating systems not designed for the size and layout of your home are all common culprits.
That leads to the same frustrations we hear from Dunedin homeowners every winter:
A home that never seems to warm up
Electricity and diesel bills climbing every winter
Inconsistent temperatures between rooms
Systems that are always running “just to keep up”
In general, the problem isn’t how much you’re heating. It’s the efficiency of your system itself and how it’s configured. Most jobs we run in Dunedin involve replacing diesel or gas boilers in older villas — Roslyn, Mornington, North-East Valley, Maori Hill, St Clair, Mosgiel — where the radiators and pipework are still solid but the boiler is past its life. The radiators stay, the boiler comes out, and an air-to-water heat pump replaces it without ripping the system apart.
Get My Free Survey & QuoteWhy Dunedin Homeowners Choose Highlander Heating
One installer designs, fits, and commissions every system. Not a sales rep, not a subcontractor
Heat-loss calculations done property-by-property. Older Dunedin villas and modern builds need different specs
DCC noise compliance handled at design stage, not after the install
Diesel and gas boiler retrofits without ripping out existing radiators
0% to 1% bank finance available through Westpac, ANZ, ASB, and BNZ green-home loans
Direct contact with your installer, before, during, and after the job
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What an Air-to-Water Heat Pump Installation in Dunedin Looks Like
Air-to-water heat pumps are the new way forward for living and for bringing your old home into the future. With good system design, the right-sized radiator or underfloor system, and full commissioning, an air-to-water heat pump can offer great comfort with much reduced running costs.
At Highlander Heating, we also offer complete air-to-water heat pump installations. From heat-loss calculations through the final walkthrough, each system is custom-designed, installed, and tuned for efficiency.
For a deeper look at how these systems perform through Dunedin and Otago winters, see our guide on heat pump efficiency in cold weather.
Get My Free Survey & QuoteHow We Help
Every installation is tailored to Dunedin homes and Dunedin weather. Instead of offering scattered services, Highlander Heating delivers a complete, end-to-end air-to-water heat pump package, designed, installed, and commissioned properly so the system performs at its best from day one.
Full heat-loss survey + system design
Air-to-water heat pump installation
Cylinder upgrades (when required)
Radiator or underfloor adjustments
Full commissioning + setup
Ongoing servicing + maintenance
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How an Air-to-Water Heat Pump Works
Air-to-water heat pumps extract heat from the outside air to warm water at a lower temperature than standard boiler systems, suitable for use in radiators or underfloor heating. They’re designed to generate more heat than the electricity they consume, which is why homeowners find them cost-efficient.
Why they perform well in Dunedin:
Built for cold-weather use
Keep your home consistently warm for long winter months
Perfectly matched to a well-designed radiator or underfloor systems
Bring steadier, more comfortable home temperatures. Not on/off peaks.
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Air-to-Water Heat Pump Installation Cost in Dunedin
Most A2W installations in Dunedin run between $38,000 and $80,000+. Diesel or gas boiler retrofits with existing radiators sit at the lower end. New builds and complex hydronic upgrades sit higher.
Boiler retrofit onto existing radiators or underfloor: $38k – $55k
Standard new build with full hydronic install: $55k – $80k
Premium specifications and complex upgrades: $80k+
Fixed-price quote with itemised heat-loss calculation, no vague “from” pricing
Full breakdown in our A2W heat pump cost guide for 2026
Get My Free Survey & Quote0% to 1% Bank Finance for Heat Pump Installation
Major NZ banks now run dedicated green-home finance products that turn the upfront cost into a monthly payment, often less than the diesel bill it replaces. Eligibility differs by bank — confirm current rates with yours directly.
Westpac Greater Choices: 0% to $50,000 over 5 years
ANZ Good Energy: 1% to $80,000 over 3 years
ASB Better Homes Top Up: 1% to $80,000 over 3 years
BNZ Better Future Home Loan: 1% to $80,000 over 3 years
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Our Process
Our Process
From first call to commissioning, every step handled by one installer.
Free Heat Loss Survey & Quote
We evaluate your home, determine heat demand and system design, and communicate the system that’s right for your layout and home.
Installation & System Upgrades
We fit the heat pump, cylinder (if you need one), radiators/underfloor adjustments and all related systems meticulously with clean hands.
Full Commissioning & Handover
Your system is now balanced, tested and programmed. Then we explain how everything works so you’re good to go from day one.
Our Guarantees & Reassurance
Everything you need for peace of mind.
2-year workmanship guarantee
Up to a 5-year manufacturer warranty
Local Dunedin fitter: genuine responsibility
Direct contact, not call centres
Ongoing servicing and support
Fully commissioned for optimum performance when in place
Itemised heat-loss calculation in every quote, no vague “from” pricing
DCC noise compliance documented as part of every Dunedin install
Still unsure?
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Common Questions (Answered Clearly)
Most Dunedin retrofits where the radiators and pipework stay in place take 3–5 working days, with hot water and heating restored within the first 24 hours. New-build installs in Dunedin can take longer depending on how the property is being staged.
Yes. Air-to-water systems heat both your home and your domestic hot water from a single outdoor unit, sized for typical Dunedin household demand and designed to handle peak winter loads.
Most Dunedin homeowners coming off diesel or older electric central heating see running costs roughly halve after switching, depending on house size, insulation, and usage patterns. Exact figures come out of the heat-loss survey.
Most Dunedin homeowners coming off diesel or older electric central heating see running costs roughly halve after switching, depending on house size, insulation, and usage patterns. Exact figures come out of the heat-loss survey.
Dunedin City Council has strict boundary noise limits, particularly at night. We site the outdoor unit during the design stage to meet DCC rules, including any specific zoning that applies to your Dunedin property.
We install across all Dunedin suburbs, including Roslyn, Mornington, North-East Valley, Maori Hill, St Clair, St Kilda, Macandrew Bay, Green Island, and Mosgiel, plus surrounding areas. Rural and lifestyle properties around Dunedin are also covered.
Not for the full duration. Most Dunedin homeowners are home for the first day (initial system setup) and the final day (commissioning and handover). The middle days are mostly internal pipework and outdoor unit installation.
Get Your Free Air-to-Water Heat Pump Quote in Dunedin
Get a free heat loss survey & personalised quote for your Dunedin property.