Generate heat energy from air

A heat pump generates heat energy from air using a similar principle to a refrigerator. While the refrigerator conducts the warm air outside, the air-water heat pump brings the heat from the ambient air into the room. Specifically, a fan actively draws in the ambient air and transfers it to a heat exchanger (evaporator) installed in the heat pump. 

A refrigerant circulates inside it, changing its physical state and evaporating even at low temperatures. To raise this refrigerant steam to a level that can be used for heating and hot water production, it is compressed using a compressor.

Which heating system is the best for you?

The Vitocal air source heat pumps product line-up

Vitocal 200-A Air Source Heat Pump
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Vitocal 200-A

An ideal solution for environmentally responsible, low cost heating

The monobloc Vitocal 200-A heat pump utilises the latent heat in outdoor air for environmentally responsible and cost effective heating. With energy ratings of A++, the incredibly efficient unit is also extremely quiet, ma...

  • Low Operating
  • Energy Efficiency
  • Wireless control 
    & monitoring
  • Existing system
Discover the Vitocal 200-A
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Vitocal 222-A

A compact air/water heat pump unit in monobloc design

With its monobloc design and an output range of 2.3 to 11.8 kW, the Vitocal 222-A uses the heat contained in the outside air for environmentally friendly and cost-effective heating and cooling.

  • Air source
    Heat pump
  • Up to
    11.8 kW
  • Energy efficiency 
    Up to A++
  • DHW storage
    220 litres
Discover the Vitocal 222-A
Vitocal 300-A
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Vitocal 300-A

An efficient and attractive air source heat pump

An air source heat pump that is designed to catch the eye. Designed for installation in the garden, it utilises the free heat available in the ambient air and boasts low noise levels, high performance and exceptional effic...

  • Designed for
  • Air source
    Heat pump
  • Detached and
  • Up to
    8.5 kW
Discover the Vitocal 300-A
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Vitocal 350-A

A powerful air-source heat pump that is ideal for modernisations

A powerful and efficient air source heat pump for indoor or outdoor installation. Suitable for modernisation projects, the 350-A can be used in older systems with radiators and also offers high DHW convenience. Supports ca...

  • Designed for
  • Air source
    Heat pump
  • Detached and
  • Up to
    18.5 kW
Discover the Vitocal 350-A

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how air source heat pumps work

Air source heat pump

Heat from the air

[1] Vitocal heat pump

[2] DHW

[3] Heating water buffer cylinder

Indoor or outdoor installation possible

Air source heat pumps are among the most frequently used heat pumps, not only due to their relatively low investment costs but also to their many installation options.

Vitocal 300-A Heatpump round
Woman signalling to be quiet

Particularly quiet in operation

Modern air-source heat pumps from Viessmann operate very quietly and are hardly audible during operation, as a result of years of intensive research and development work. 

Viessmann heat pumps feature Advanced Acoustic Design, in which all components of the heat pump are designed to minimise noise. In particular, low-frequency noises which are perceived as particularly disturbing have been minimised.

Design & Technology

In the monobloc version, all components important for heat recovery are located inside the heat pump. The connecting lines between the indoor and outdoor units are only filled with water, meaning such devices can be brought into operation quickly and easily. The specialist carrying out the work does not have to have a cooling certificate or a Gas Safe registration. Because most devices operate very quietly, installation close to the living area is possible.

Depending on the application, air source heat pumps can be used in a variety of ways. The Vitocal 350-A and Vitocal 300-A air-water heat pumps are particularly suitable for modernisation projects, whereas the Vitocal 200-A air-water heat pump is more suitable for new builds. Compared to a brine-water heat pump, the investment in an air-water system is lower because the installation of a geothermal collector or the drilling work for the geothermal probe is completely eliminated. 

The heat pumps are designed for both indoor and outdoor use, with outdoor installation being a particularly space-saving option. Only the control system and the hydraulic components are mounted on the wall in the house.

A summary of the advantages of an air-water heat pump

Air-source heat pumps offer numerous advantages including:

  • Free heat source available at any time of day
  • Relatively low investment costs
  • Expandable thanks to cascade function
  • No official approval required
  • Suitable for both new builds and modernisation projects
  • Retrofitting possible

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