The Viessmann Vitocal heat pumps

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Our smart Vitocal heat pumps use environmental energy

Not only can the Viessmann Vitocal product range offer heating, it can also be used for cooling and to supply a building with hot water. And unlike other heating systems, no fuel such as oil or gas has to be burned for this. Instead, the Vitocal uses free energy directly from the environment – be it from the ambient air, groundwater or the ground. This not only saves resources, but also reduces carbon dioxide emissions.

Using energy from the environment for heating, cooling and DHW with Vitocal

Viessmann Vitocal heat pumps are suitable for both new build and modernisation. With a flow temperature of up to 70 °C, the Vitocal 250-A was specially developed for modernisation projects. Existing radiators can continue to be used. Underfloor heating is not essential. High energy efficiency, convenient control via app, sustainable operation and attractive design are all convincing features.

Answers to questions about the new Vitocal

App control, noise level, pumping - the following videos answer the most frequently asked questions about the latest Vitocal generation.

Ideal for combining

Viessmann heat pumps can also be  combined  with existing heating systems that still run on oil or gas. The boilers already in place are tasked with covering peak loads. The rest of the time, the Vitocal heat pumps provide heating and hot water.
Vitocal heat pumps can also be combined with a photovoltaic system. The self-generated electricity is used to power the heat pump. This is because, in addition to environmental energy (about three quarters), around one quarter electricity must be supplied so that the heat pump can convert the ambient energy into usable heat. With the special Vitocal function, the refrigerant, which serves as the transfer medium, has to be both compressed and then expanded again. Compressors and expansion valves are used for this. They require electrical energy. You can find out how this works in detail here:  How a heat pump works.

Using the Viessmann Vitocal for cooling

In addition to heating and hot water, Vitocal heat pumps can also provide cooling. A distinction must be made between natural cooling and active cooling. In the case of the former, brine or groundwater extract heat from the heating circuit via a heat exchanger. This heat is transferred outdoors. The natural ambient temperature is then used for cooling. It should be emphasised that only the circulation pump and control unit remain switched on during this process. All Viessmann brine/water heat pumps use this form of cooling. An accessory is required for the integral cooling function: the NC-Box. The NC-Box is equipped with a mixer for integration into the cooling circuit. This enables continuous operation without falling below the dew point.

Another option is active cooling. Here, the function of the heat pump is reversed. The Vitocal then functions like a refrigerator. In addition to the Vitocal  200-S and Vitocal  222-S split heat pumps, the 200-A and 222-A are also equipped with circuit reversal.

Both cooling versions are combined via the Viessmann AC-Box, which can be used to extend the Vitocal  300-G brine/water heat pump. Depending on the required room temperature, the system switches automatically.

What sets the Viessmann Vitocal product range apart?

All Viessmann Vitocal heat pumps are characterised by very quiet operation, with low vibrations and low maintenance. In addition, they have an impressively high coefficient of performance (COP). This describes the ratio of heat transfer to power consumption. The higher this value, the more efficiently the heat pump works.

Vitocal products operate quietly due to the sound-optimised, low vibration appliance design. The Vitocal  200-S and 222-S split heat pumps are distinguished by extremely quiet indoor units. With these two models, the refrigerant circuit is split between two units. The evaporator and compressor are housed in the outdoor unit. The condenser, on the other hand, is located in the indoor unit.

In addition, many models can be installed close to the living space, as they do not take up a lot of room. This is what marks out the Vitocal  333-G and 222-G compact units in particular. The footprint of the former, for example, is less than half a square metre.  

Vitocal product range: flexible application options

Vitocal heat pumps offer flexible use with their different output stages and modulating operation. This means they are not just suitable for newly built detached houses, but also apartment buildings or even small commercial premises. The Vitocal  350-G high temperature heat pumps are ideal for larger existing buildings that are equipped with radiator heating systems. This is because they provide high flow temperatures of up to 70  degrees Celsius. Accordingly, they can also be used very effectively in the modernisation of detached houses and apartment buildings.

It is also possible to increase the heating output and cooling capacity by creating what is known as a cascade. This means that several Vitocal heat pumps from the same model series can be connected in series. For example, an output of up to 589  kW can be achieved with the Vitocal  300-G by using the integral cascade function.

For more sizeable residential or apartment buildings, it is possible to install large Viessmann heat pumps. For example, a Vitocal  300-G/-W  PRO achieves up to 240 or 290  kW. If several of these models are in turn connected in a cascade, an output of up to 1450  kW is feasible. They are therefore also suitable for commercial enterprises and local authority premises.

The most important features of the Vitocal models at a glance

Heat pumpType

DHW cylinder


Vitocal 262-A

Monoblock indoor installation

Yes,  for types T2E/T2H

Detached houses, new build and modernisation projects


Heat pumpHeat

DHW cylinder


Vitocal 350-G

Ground, water*


Apartment buildings, commercial enterprises, high temperature


+ Accessories required

Product range