Hydronic Air to Water Heat Pumps

 If you’re looking for an energy efficient means of providing your home with hydronic infloor or radiator heating and Geoexchange is not the option for you then the next best option is an 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 a Hydronic Air to Water Heat Pump
The main use for a hydronic heat pump is providing heated water to your hydronic floor heating system, but they can also be used to provide heated water to hydronic radiators, hot water for domestic purposes (washing etc) and pool heating.

The Difference with Our Heat Pumps
Not all hydronic heat pumps are created equal. Due to the Stiebel Eltron heat and NIBE pumps being manufactured in Europe they have 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 and NIBE units 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 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
Hydronic Air to Water Heat Pump installed for hydronic infloor 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 infloor heating system utilising a Stiebel Eltron air to water 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.

Why use a buffer tank?
If you have been looking at hydronic heating systems for your home utilising other heat pumps you may notice we have included a buffer tank. You may ask why have we included this when others haven’t or say you don’t need one? This is because the primary role of a buffer tank is used to keep a minimum volume of water in the heat pump circuit at all times even when the heating load is very low. This prevents the heat pump from short cycling and provides a bypass route to maintain the minimum flow rate through the heat pump if most of the heating zones have shut down or have a reduced flow. Both the minimum flow rate and the minimum volume of water in circuit are necessary to keep the heat pump happy and operating to the manufactures tested specifications. Even on an inverter heat pump a buffer vessel is recommended. 


  • 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 infloor and radiator heating using the Stiebel hydronic heat pumps
Stiebel Air to Water Hydronic Heat Pump


  • 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.