Air-to-water heat pumps are becoming increasingly popular for building heating systems. This is one of the most innovative and suitable solutions for replacing geothermal heat pumps. Unlike geothermal heat pumps, no additional land is required for installing a horizontal loop and no deep boreholes are needed for a vertical probe; an outdoor compressor unit is sufficient and can be installed practically anywhere – on a wall, roof or balcony. Expensive construction work is not required, there is no need for fuel storage space, and the system is fire-safe because no combustion processes take place.
An air-to-water heat pump prepares the heat transfer medium for the heating system and also provides domestic hot water. Heat pumps are available in the following versions: monobloc, heat pump with separate hydro module, and heat pump with separate hydro module plus integrated hot water tank.
The DAIKIN Altherma 3 air-to-water heat pump series is a third-generation heat pump series. The models in this series operate with R32 refrigerant, which is more environmentally friendly and allows the units to achieve higher energy efficiency. Electric heating elements from 3 to 9 kW are available with the units. The internal hydro module includes a built-in circulation pump, heat exchanger, expansion vessel and control system. With the help of the compressor, it can operate even in frost down to -25°C.
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