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Stiebel Eltron WPL-A 07 | Hydronic Heat Pump | Australian Hydronics

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Stiebel Eltron WPL-A 07

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The WPL-A Premium air source heat pump is not only suitable for heating and hot water but also provides cooling in the summer months. Since the inverter unit achieves high flow temperatures even at very low outside temperatures of down to –25 °C, it is equally suitable for use in new build and renovation projects. The WPL-A HK Premium contains a futureproof refrigerant. In combination with its high efficiency, the heat pump scores highly as an environmentally responsible heating technology.

Product Details

  • Air source heat pump for heating, hot water and cooling
  • Inverter technology provides adjusted heating output
  • High flow temperatures of up to 75 °C enable high DHW temperatures and mixed water volumes
  • Low operating costs through high efficiency all year round
  • Smart Grid ready for connection to solar PV and energy management systems


Stiebel Eltron

WPL 25 AC (Three Phase), WPL 25 ACS (Single Phase)

Technical Data

Model Number WPL-A 07
Energy efficiency class A+++
Rated voltage 230 V
Output at A7/W35 (EN14511) 10.75 kW
Coefficient of performance at A7/W35 (EN14511) 5.42
Sound power level (EN 12102) 48 dB(A)
Sound pressure level at 5 m distance in a free field 26 dB(A)
Max. application limit on the heating side 75°C
Refrigerant R454 C
Height 900 mm
Width 1270 mm
Depth 593 mm
Weight 135 kg


File Category Type Download
WPL-A 07 Premium Datasheet Data Sheet PDF
1.73 MB
WPL Commissioning Guide Operation and Installation Guide PDF
1.22 MB
WPL-A 07 Premium Operation & Installation Guide Operation and Installation Guide PDF
14.18 MB
WPL-A 07 Premium Operation & Installation Guide Operation and Installation Guide PDF
14.18 MB
WPL-A 07 Premium Foundation Drawing Technical Drawing PNG
221.88 kB
WPL-A 07 Premium Minimum Spacing Technical Drawing PNG
581.68 kB


1. How does a hydronic heat pump work to heat my home?

Air source heat pumps use a refrigeration circuit to harvest energy from the air. This energy is then used to heat the water which is pumped through a hydronic heating circuit, such as in-slab piping or radiators, to warm your home.

2. How noisy is a hydronic heat pump?

Hydronic heat pumps from STIEBEL ELTRON are the quietest on the market thanks to an encapsulated refrigerant circuit and acoustically isolated compressor. Advanced sound engineering guarantees that heat pumps from STIEBEL ELTRON can be used in neighbourhoods with a dense population. Many models even feature an additional silent mode.

3. Can a hydronic heat pump system still heat my home when it is cold outside?

Yes, hydronic heat pumps from STIEBEL ELTRON are engineered to operate energy efficiently even when outside temperatures fall below zero. Advanced technology from Germany ensures efficiency even at cold temperatures down to -20°C. For instance, the natural defrost function of the WPL 25 AC(S) comes into play in temperatures around 0°C to ensure a smooth and efficient operation when it becomes frosty in Australian winter.

4. Can I use hydronic radiators with this heat pump?

Yes, STIEBEL ELTON offers a wide range of hydronic heat pumps which serve as heat source for either under floor heating or radiator heating, or both. This depends on the models’ flow temperatures. Please consult with a STIEBEL expert to identify the right system for your needs.

5. Where can I purchase a STIEBEL ELTRON hydronic heating heat pump from?

STIEBEL ELTRON is working closely with hydronic heating specialists throughout Australia. Feel free to get in touch and ask for a recommended installer.

6. Do I need three phase power to operate a hydronic heating heat pump?

STIEBEL ELTRON offers both single and three phase models. The letter S in the model description stands for single phase, such as the WPL 25 ACS. Please also check the technical details on the product page of your model or contact STIEBEL ELTRON for further advice.

7. Can I control my hydronic heating heat pump from my mobile device?

All STIEBEL ELTRON heat pumps in Australia are offered with an optional ISG web, which allows you to control and monitor your heating system via a home network or mobile device.

How does a heat pump work



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