Air-water heatpumps

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Air-to-water heat pumps are highly efficient heat sources for warm water central heating. They extract renewable energy from the ambient air and convert it into heat for your system. By leveraging the principles of thermodynamics, these pumps transfer heat from the outdoor air to a refrigerant fluid. Through compression and expansion, the heat is amplified and transferred to the water circulating in your central heating system.

The key advantage of air-to-water heat pumps is their exceptional efficiency, generating up to four times more heat energy than the electrical energy they consume. This makes them both sustainable and cost-effective, reducing reliance on traditional fuel sources and minimizing carbon emissions. These pumps offer versatility, easily integrating into new constructions or existing heating systems, providing reliable and efficient warmth for various property types and sizes.

In summary, air-to-water heat pumps are at the forefront of energy-efficient heating technology. They harness renewable energy from the air, offering outstanding performance and environmental benefits. Experience sustainable and cost-effective warm water central heating with air-to-water heat pumps.


Air to water heat pumps scavenge heat from the ambient air to create hot water. They are extraordinarily efficient, over 400%, which makes electricity a viable energy if gas is not available.

Typical Running Cost:

Vaillant aroTHERM Plus Heat Pump 9kw, 16kw

The new aroTHERM Plus uses the natural refrigerant, R290 to achieve higher flow temperatures of up to 75°C. Suitable for all applications, this air source heat pump can use existing radiators and operates down to -25°C.

It also provides significant product benefits for customers, such as a high flow temperature of 75°C, which makes the solution perfect for use during refurbishments. It is one of our first products to use R290 – more will follow in the future.

  • Ultra high efficiency air to water heat pump
  • For underfloor heating, cooling and or indirect domestic hot water production
  • Low noise level (35dBA @4meters) ensures quiet operation for the comfort of home owners and neighbours
  • Floor standing, outdoor
  • Made in Germany
  • Guarantee: 5 YEARS parts and labour
  • Two models available; 9kW and 16kW

Grant Aerona Heat Pump 16kW

  • High efficiency air to water heat pump
  • For underfloor heating
  • Heat output 16kW (Water 35deg.C / Air 7deg.C D.B)
  • COP 4.19 (30/35deg.C / 7deg.C D.B)
  • Power supply: 230V/1Ph/50Hz
  • Floor standing, outdoor
  • 1418mm high x 1000mm wide x 356mm deep
  • Made in Ireland
  • Guarantee: 5 YEARS parts and labour

Grant Aerona Heat Pump 10kw

  • High efficiency air to water heat pump
  • For underfloor heating
  • Heat output 10kW (Water 35deg.C / Air 7deg.C D.B)
  • COP 4.35 (30/35deg.C / 7deg.C D.B)
  • Power supply: 230V/1Ph/50Hz
  • Floor standing, outdoor
  • 866mm high x 850mm wide x 357mm deep
  • Made in Ireland
  • Guarantee: 5 YEARS parts and labour

Chofu 6kw, 10kw, 16kw

Chofu heat pumps are made in Japan and have been tried and tested in New Zealand for the past five years. The high-quality heat pump features a single phase inverter compressor with an integral room controller for heating times and temperatures, including DHW production.

Chofu supplies OEM to many Japanese and European heat pump companies.

    • Max flow temperature of 60°C,min outside air temperature -20°C
    • 5 year warranty
    • Very low noise
    • Pump, expansion vessel and pressure gauge included in HPTF10 and HPTF16 units
    • Indoor room unit and/or thermostat
    • Environmentally friendly R32 refrigerant gas

Mitsubishi Ecodan

  • Could help you save up to 70% off your bills*
  • Environmentally conscious solution
  • Ultra quiet
  • Specifically designed for New Zealand conditions
  • Smart energy monitoring
  • Made in the UK
  • Guarantee: 5 YEARS parts and labour

Ritter Thermal R290 Heatpump

The Ritter R290 is a cutting-edge air-to-water heat pump that stands out for its eco-friendliness, using the low-global warming potential R290 refrigerant. It’s designed for efficiency and versatility, featuring full inverter technology for energy-saving operation, capability to work in extreme temperatures, and remote control via a smartphone app.

  • Eco-friendly Refrigerant
  • Energy-efficient Operation
  • Wide Operating Range
  • Remote Access and Control
  • Durable and Quiet Design
  • Versatile Heating and Cooling Solutions
  • Efficient Hot Water Production
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