Air to Water Hydronic Heat Pumps

 If you’re looking for an energy efficient means of providing your home with hydronic underfloor heating or hydronic radiator heating system the next best option to our Geoexchange heat pumps is to select a quality air to water hydronic heat pump. Hydronic air to water heat pumps harvest the natural stored renewable energy in the air to efficiently create heated and chilled water. We have selected units from two of the worlds leading manufactures that we feel are the best quality with the highest efficiencies on the market. 

The Uses of an Air to Water Hydronic Heat Pump
The main use for a hydronic heat pump is providing heated water to your hydronic underfloor heating system, but they can also be used to provide heated water to hydronic radiators, hot water for domestic purposes (washing etc), pool heating and can often be reversed to cool water for hydronic underfloor cooling and forced air fan coil cooling.

The Difference with Our Air to water hydronic Heat Pumps
As not all hydronic heat pumps are created equal we have carefully selected our hydronic air to water heat pumps based on quality, efficiencies and control to give you a hydronic heating system that will give you many years of trouble free comfort. For this reason we currently provide heat pump systems from Stiebel Eltron, EcoForest and NIBE. All of which are being manufactured in Europe to meet an extremely high testing regime that is not replicated anywhere in the world. Another huge difference between most other hydronic heat pumps on the Australian market and the Stiebel Eltron, EcoForest and NIBE air to water heat pumps is the control system supplied with the heat pump is integral to its greater efficiency. Where most heat pumps except an “dumb” on/off signal from your control system the Stiebel Eltron, EcoForest and NIBE heat pump monitors internal home temperature, external air temperature and the temperature of the water in your heating system and adjusts it accordingly giving you a greater level of comfort and a higher level of efficiency.  

Adelaide Geoexchange can provide Hydronic air to water heat pumps in South Australia
Air to Water Hydronic Heat Pump installed serving a mixed hydronic underfloorfloor and radiator heating at Waterfall Gully in Adelaide.

Air to Water Heat Pump System Overview

Stiebel Eltron Hydronic Heat pumps System Component overview with hydronic infloor heating Adelaide Geoexchange

The above diagram shows and overview of a hydronic underfloor heating system utilising a Stiebel Eltron air to water hydronic heat pump. You will see a heat pump, HMS trend heat pump controller/pump set, buffer tank and a hydraulic module. Using the above kit gives you a total system solution. 


  • Made in Germany
  • Outdoor installation to harvest energy from the air and turn it into comfortable warmth in your home
  • Single phase and 3 phase models available
  • High efficiency due to vapour injection technology: COP of 5
  • Advanced inverter technology ensures high efficiency
  • Market leading sound technology: quiet operation at 46 dB(A) from 1 m distance
  • 65°C flow temperatures – suitable for radiator heating
  • Designed for Australian homes
  • Suited for new builds as well as renovations
  • Natural defrost function for energy efficient operation even in cold climates down to -20°C
  • Smart Grid and Solar PV ready

Peace of Mind
Stiebel Eltron started life in the 1930’s manufacturing instantaneous water heaters adding the development and manufacturing of heat pumps in 1976. This gives us confidence that not only has the company been around for a while they have over 40 years of heat pump experience. This is a rarity in hydronic heat pump manufactures bringing equipment into Australia with most being made in China often pieced together with inferior components.

Adelaide Geoexchange are your Stiebel Eltron Air to Water Hydronic Heat Pump specialist. We can provide hydronic underfloor heating using the Stiebel Eltron ACS hydronic heat pumps
Stiebel Air to Water Hydronic Heat Pump


  • Made in Spain
  • Power range: 1-9 kW / 3-12 kW / 5-22 kW;
  • Heating;
  • Active cooling;
  • Simultaneous heat and cool;
  • Quick and sensible control through internet, using ecoSMART easynet module;
  • Domestic hot water production with external cylinder;
  • Integrated HTR technology;
  • Single phase (230V) and three phase (400V) power supply options;

In installations where the geothermal option is limited or not available, the Aerothermal unit is the solution. This unit allows the ecoGEO heat pumps to use external air as source of energy.

The AU12 is equipped with a very silent and highly efficient axial Ziehl-Abegg fan, that with our exclusive defrost technology allows to significantly increase the seasonal performance factor (SPF). This system completely eliminates the idle times of the heat pump during defrost cycle, because isn’t necessary to invert the refrigerant cycle or to activate external electrical heaters during the process.

Aerothermal unit for use with ecoForest heat pumps
EcoForest AU12 Dry Cooler


  • Made in Sweden
  • Air/water heat pumps for residential use.
  • Inverter controlled compressor
  • Cooling Function on some models
  • Single phase and 3 phase models available
  • Compact Dimensions
  • Suitable for new builds and renovations
A company of growth
NIBE is a global group that helps make the world more sustainable through its solutions for indoor climate and comfort and its components and solutions for measurement, control and electrical heating. NIBE has more than 60 years of experience manufacturing products intended for both household and commercial use. From its roots in southern Sweden, NIBE now has operations and sales on five continents. NIBE’s first heat pump was manufactured in 1981.
Adelaide Geoexchange are your NIBE Air to Water Hydronic Heat Pump specialist. We can provide hydronic infloor and radiator heating using the NIBE hydronic heat pumps
NIBE Air to Water Hydronic Heat Pump

Commonly asked Hydronic Air to Water Heat Pump questions

Yes an air to water heat pump can provide heated water for a hydronic radiator heating system. The radiators do need to be sized correctly due to the lower flow temperature compared to a gas boiler.

Yes an Air to Water Heat Pump system can provide heated water and chilled water for a hydronic infloor heating and cooling system.

Yes we are able to heat your pool, heat and cool your house + provide you hot water requirements with our Air to Water Heat Pump systems.

Yes an Air to Water Heat Pump system can replace a fossil fuel consuming boiler (Gas, Diesel and Oil) on your hydronic heating system giving you a much cleaner, energy efficient and environmentally friendly heating solution.

Yes an Air to Water Heat Pump system can be the perfect fit for a commercial application, From pool heating, Space conditioning to the production of large amounts of hot water we can tailor a solution to suit.

Yes even though we are based in the Adelaide Hills we can design and install an Air to Water Heat Pump system anywhere in South Australia. Also if you are in another State we can put you in contact with a local installer.

Yes an air to water heat pump uses electricity.