Air source heat pumps
Air-water heat pumps are among the most widely used types of heating pumps. If homeowners decide to operate an air-source heat pump, they can make use of attractive government subsidies.
How an air source heat pump works
How the heat pump generates heat energy with air can be simply described with the example of 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 in 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.
Indoor or outdoor installation is possible
Air source heat pumps are among the most frequently used heat pumps. This is not only due to their relatively low investment costs, but also to their many installation options.
Air source heat pumps in monobloc design
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, so such devices can be brought into operation quickly and easily. The specialist carrying out the work does not have to have a cooling certificate. And because most devices operate very quietly, installation close to the living area is possible.
Air source heat pump
Heat from the air
 Vitocal heat pump
 Heating water buffer cylinder
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, whereas the Vitocal 200-A air-water heat pump is suitable for new construction. 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 indoor and outdoor use. The installation outside the house is particularly space-saving. Only the control system and the hydraulic components are mounted on the wall in the house.
Particularly quiet in operation
Modern air-source heat pumps from Viessmann operate very quietly and are hardly audible during operation. This is the result of years of intensive research and development work. Viessmann heat pumps feature the Advanced Acoustic Design, in which all components of the heat pump are designed to minimise noise. Especially low-frequency noises, which are perceived as particularly disturbing, have been minimised.
A summary of the advantages of an air-water heat pump
The use of an air-source heat pump offers numerous advantages. Among the most important are:
- 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 build and modernisation
- Retrofitting possible
Air source heat pump, rated heating output: 3 to 9 kW, indoor/outdoor installation, detached houses, new build and modernisation projects, dual mode systems
Air source heat pump, rated heating output: 7 to 8.5 kW, outdoor installation, detached houses, new build and modernisation projects, dual mode systems
Monobloc air-to-water heat pump, nominal heat output: 4 to 12 kW, application area: single-family dwelling, new build