Thanks to our OCHSNER heat pump customers, since 1978
tons CO2 have been saved!

News from the world of OCHSNER heat pumps


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Information on subsidies

You can obtain information on subsidies for your modernisation / new build project by completing our questionnaire.


Heating, cooling and DHW heating. From 2 kW to 2.5 MW heating output. An overview of our portfolio is available here.



How to contact our customer service team.


Find an OCHSNER system partner near you who can advise you on your project, competently and without obligation.


Are you looking for an OCHSNER heat pump installed near you? Choose from a total of 130,000 installed heat pump systems listed here.



because they draw around three quarters of their energy from the environment and only about one quarter – drive energy – is supplied by electricity.

Heat pumps primarily use energy sources with almost unlimited availability: heat from ambient air, groundwater or the ground. In addition, there are further heat sources such as waste heat from other processes, from sewage and many more besides. For detached and two-family houses, air, ground and groundwater are of primary interest. Extract air from the building is also suitable for DHW heat pumps . There are other heat sources which can be tapped, above all in industry, commerce and the residential housing sector. Which heat source is suitable in any specific case depends on the energy standard of the building, its geographical location and the site. In case of doubt, consult an expert, such as an OCHSNER system partner. More information can be found in the sections on Groundwater heat pumpsGround source heat pumps and Air source heat pumps.


just in reverse. The basic principle governing heat pumps is always the same.

They generally operate just like a refrigerator. One end of the heat pump process generates cooling, the other end generates heat. This is very obvious in the case of a refrigerator. As the interior is cooled, heat is generated behind the refrigerator which is transferred to the ambient air. In a thermodynamic process, heat pumps make use of the fact that the temperature of certain refrigerants changes when they are put under pressure or allowed to expand. If pressure increases, the temperature rises as well. If the pressure decreases, it drops. Within the heat pump circuit, the refrigerant draws heat from the ground, groundwater or air until it has warmed to approximately the same temperature as these media. The liquid is then compressed in a compressor, which raises its temperature. At the other end of the process, this higher temperature is transferred to the heating system water or domestic hot water via heat exchangers. This causes the temperature of the compressed refrigerant to drop. The liquid is then relaxed, whereby the temperature falls further an dramatically – to a temperature significantly lower than the initial temperature. The decompressed, cooled liquid is then returned to the heat source – ground, groundwater or air – where it is heated, and the heat pump cycle of compression, heat transfer, decompression and cooling can start all over again.


Highest efficiency

For almost 40 years, OCHSNER has been concentrating exclusively on the development and manufacture of highly efficient high end heat pumps. Every OCHSNER heating heat pump is manufactured specifically to your requirements using only high grade components. As part of commissioning, your system is adapted to suit your individual circumstances and conditions. To safeguard your investment in the long term, we recommend your heat pump is serviced regularly. This assures you of permanently low running costs, it extends the service life of your system and prevents possible faults.


On the safe side

In many respects you'll be on the safe side with OCHSNER. Heat pumps use free environmental energy – a heat source that never fails. 

Furthermore, OCHSNER heat pumps are built to a high quality standard and are designed for a long service life. Not only is close attention paid during quality control at the factory, the correct installation of the entire system, which is carried out by our system partners, is also of critical value to us. Consequently, our quality control procedures also include the documentation of all system data. This data also forms the basis for OCHSNER's efficient customer service. 

Benefit from our expertise and experience gained through decades of research, development and production at our site in Austria, and proven in over 130,000 installed systems.



OCHSNER heat pumps are true all rounders. They provide the standard functions of heating, cooling and DHW heating. However, with OCHSNER, you can also heat your swimming pool, integrate a PV system and more besides.

OCHSNER heat pumps operate automatically and require little servicing. You will not have to contend with oil tanks, buying pellets, paying a chimney sweep, or worry about servicing a burner or organising a flue gas test. Ash disposal and the servicing of complex mechanical appliances are not an issue for you.

Just enjoy the convenience of it all. OCHSNER focused on user friendliness in the design of its OTE home climate manager heat pump control system. Advanced technology offers you the greatest convenience, maximum energy efficiency and the highest degree of operational reliability.

Environmentally responsible

For you and your environment

OCHSNER heat pumps utilise solar energy stored in the air, in water or in the ground, thereby making a valuable contribution to climate protection. They operate with non-toxic, ozone-neutral and non-flammable safety heat transfer media.

Those who opt in favour of a heat pump not only reduce CO2they also avoid annoying fluctuations in oil and gas prices and the fear of fuel shortages.

In addition, dependence on uncertain supplies from abroad is no longer a risk factor to be considered. You won't need to worry about where your fuel is coming from in 20 years' time or thereafter.

For new build and heating system modernisation

Heat pumps are suitable for new build as well as modernisation projects. Regardless of whether your building has underfloor heating, wall-embedded heating or radiators – OCHSNER was the first manufacturer, many years ago, to launch a range of heat pumps with flow temperatures of up to 65 °C, now extended to 68 °C through the latest developments. Operation of existing heating systems with conventional radiators is now possible.


The efficiency values of an OCHSNER heat pump will help you to reduce the total outlay of building and system technology right now. Using OCHSNER high efficiency heat pumps, you will have no problem meeting applicable standards and building regulations (EnEV, KfW Haus [German reconstruction credit institute], energy performance certificate, etc.). And this with no investment in thermal insulation or system technology. Savings achieved in the reference building according to DIN 18599 amount to several thousand euros, for example. The significantly better performance data achieved by OCHSNER, compared to standard values, also provide a basis for improving energy performance certificate values (CO2 reduction and primary energy demand).

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Find more information on heat pumps here.