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**Earth
In many cases the heat pump with ground probe is advisable. The performance and annual coefficient of performance is very high.
****This heating system has a very high coefficient of performance and annual performance factor and is particularly suitable for small and medium-sized buildings and for combined systems.
If the house is built on piles, these can be equipped as energy piles.
Water
If sufficient groundwater is available, it is recommended to use the heat of the groundwater. Very high coefficients of performance characterize this system.
****If your house is located near water bodies, it is advisable to use this energy source by means of a heat pump.
Air
In many cases, the use of ambient air is the cheapest solution.
The energy utilization of the ambient air by means of a split system has among advantage that even less space is needed in the basement.
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Dolder Wärmetechnik AG
Fährenstrasse 3A 9430 St. Margrethen SG
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