Renewable Hydronic Heating

Renewable energies will become the norm for the future of energy supply as more people recognise the benefits of green and self-generated power from renewable sources. This includes using the latent energy from the air outside your home and the energy within the earth below your home.

Fossil fuels are in decline on the electricity market – too harmful to the climate and becoming ever more scarce. Nowadays, alternative energies using the sun, wind and water are being used to generate green power.
So it is only logical to act in good time to convert the largest energy consumer in your home – the heating system – to these future-proof forms of energy. As nearly 60 % of energy consumed in Australian homes is used for heating and cooling as well as domestic hot water, this makes perfect sense. So there is plenty of scope for implementing the energy transition in your own home.

Australian Hydronic Heating and Cooling, a division of AJ’s Plumbing Pty Ltd, work with suppliers such as Stiebel Eltron and Rinnai, companies which have become synonymous with high quality space heating, water heating and renewable energy products. Below are details of a range of their products including air source and geothermal hydronic heat pumps which Australian Hydronic Heating and Cooling can source, install and maintain for your property.

Air source hydronic heating heat pumps

Outdoor air is supplied to the air source heat pump – installed either indoors or outdoors – via flexible hoses and a quiet fan. A heat exchanger extracts the latent energy from the air which is converted by the heat pump into useful heat for your home. Even at icy temperatures as low as –20 °C, the air source heat pump still operates efficiently and economically, all the while impressing with its outstanding COP. Very high flow temperatures can also still be achieved without backup from a booster heater.

WPL 25 AC / WPL 25 ACS

Stiebel outdoor renewable air source heat pump
Enjoy comfortable warmth in your home during the chilly winter months thanks to the WPL 25 AC(S) range of air source hydronic heat pumps from STIEBEL ELTRON. Heating your home with energy harvested from the air, hydronic heating is a cost-effective way to keep your home warm and cosy. Designed for outdoor installation in Australian conditions, the WPL 25 AC and WPL 25 ACS systems is a perfect start for the transition from fossil fuels to renewable energies in your home.
  • Made in Germany with premium quality parts
  • Minimum operating noise that can be further reduced with the silent mode function
  • High efficiency thanks to advanced inverter technology
  • Small footprint
  • Ideally suited to high-performing houses with a small heating load
  • Energy efficient operation delivers exceptional COP of 5
  • Outdoor installation to harvest energy from the air and turn it into comfortable heat for your home
  • SmartGrid and solar PV ready to integrate in-home energy management system

WPL 17 ACS classic

This air source heat pump for hydronic heating is ideal for high-performing houses with a small heating load. Engineered for outdoor installation, the footprint of the WPL 17 ACS classic is small, meaning it can be used where space comes at a premium.
  • Outdoor installation to harvest energy from the air and turn it into comfortable heat for your home
  • Ideally suited for under floor heating in new builds – heating output matches the standard Australian home
  • Suitable for use with radiators – up to 65 °C flow temperatures
  • Increased efficiency through enhanced saturated vapour injection
  • Energy efficient inverter technology for high flow temperatures even on cold winter days
  • Very quiet operation for use in dense neighbourhoods
  • ISG unit allows for comprehensive after sales support
  • Smart Grid ready for connection to solar PV and energy management systems
  • Natural defrost function ensures efficient operation in cold areas
Renewable Stiebel air source heat pump

WPL 24 I

Indoor renewable Stiebel air source heat pump
This air source heat pump has been designed specifically for installation inside your home. It includes a modulating fan control in the which keeps operating sound extremely quiet, and provides high-temperature flow-rates up to 65°C to allow for both in-slab and radiator heating.
  • Air source hydronic heat pump for indoor installation
  • Increased efficiency through enhanced saturated vapour injection
  • With energy efficient inverter technology
  • Very quiet operation to ensure STIEBEL ELTRON premium quality and home comfort
  • ISG unit allows for comprehensive after sales support
  • Smart Grid ready to connect to solar PV as well as home energy management systems
  • High flow temperature for use with radiators

WPL 57

The robust WPL 57 has adequate energy reserves to cope with higher heating demands, such as those common in apartment blocks or commercial buildings. Even at temperatures as low as –20 °C, the hydronic heating heat pump can reach flow temperatures of 60 °C which makes it an optimum choice when modernising older buildings. Engineered for Australian conditions, the system utilises an efficient defrost function which allows for operation in temperatures as low as –20°C.
  • Heat pump installed outdoors and includes a corrosion-protected casing
  • Ideally suited to modernisation of commercial builds
  • High output and excellent COP even at low outside temperatures
  • Cost savings through efficient heat pump defrosting
  • Combine multiple heat pumps for output up to 186 kW
  • Installation requires 3 phase power
Renewable Stiebel air source heat pump for commercial use

Geothermal hydronic heat pumps

Geothermal heating and cooling systems tap into the abundant levels of energy stored below the earth’s surface to reduce your heating and cooling costs by as much as 30 percent. Even when it is freezing outside, temperature levels remain steady deep below the ground. With consistent temperatures under ground, geothermal heat pumps generate from one part electricity up to five parts heat. Best of all, geothermal systems can be installed in any sized home or business in virtually any location.


Save money while saving energy – the affordable WPF (S) basic series provides an ideal alternative to highly integrated geothermal heat pumps. Featuring top STIEBEL ELTRON quality, the WPF (S) basic is designed for easy installation. Thanks to its compact and timeless design, it fits nicely into your home without wasting valuable space.
  • Geothermal hydronic heat pump installed indoors for underfloor and radiator heating
  • Compact design for easy placement in your home
  • Optimal energy use through efficient circulation pump
  • Timeless design
  • Highest European energy efficiency rating A++ for low energy bills
  • Extremely quiet operation thanks to advanced sound technology
  • Ideal to use in retrofits: up to 65 °C flow temperature
Stiebel internal geothermal hydronic heat pump


In cascading operation, these compact geothermal heat pumps achieve an output of up to 400 kW. To save space in the process, individual heat pumps can be stacked on top of each other. This efficient heating solution was specifically developed for larger residential complexes, as well as commercial and industrial buildings.
  • Geothermal hydronic heat pump installed indoors or outdoors for heating
  • Specially developed for larger residential complexes, as well as commercial and industrial buildings
  • Potential for remote PC monitoring
  • Space savings as a result of stackable design
  • Very quiet operation
  • Flow temperatures up to 75 °C


Rinnai’s Geoflo geothermal heat pump harnesses the free green renewable energy from the earth for cost effective heating and cooling of your home.

The system utilises the stable temperatures found underground, and extracts this as free green energy via state of the art Rinnai technology which reliably delivers highly efficient heating and cooling air conditioning comfort in your home regardless of the outside air temperature.

  • Cost Efficient: can cut electricity consumption by 30% compared to traditional air conditioning system.
  • Quiet Operation: the geothermal system relies on the temperature of the ground to heat and cool your home, with no noisy fans.
  • Space Saving: the hardware requires a lot less space than traditional HVAC systems.
  • New or Retrofit: can be installed in new builds or retrofitted to existing buildings.
  • Easy Maintenance: with few moving parts the system has high durability and reliability.
Rinnai Geothermal Geoflo

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