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Groundsource Heat Pump

A heat pump in itself is not an energy source but a technology which makes use of the heating potential in air, ground, mountain and water (sea, freshwater, groundwater). Even excess heat from waste water, industrial processes and air flue can be utilized. Electric power is only used for the operation of fans and compressors in the heat pump. A high level of technical knowledge, both in terms of projecting and operation, is required to make sure that a heat pump installation is successful.

For smaller installations in private homes, the heat pump is dimensioned for approximately 60-70 % of the maximum need for heating.


Also, to secure a stable operation of the installation, it can be useful with a buffer tank which may be an integrated water heater. To make sure that the room temperature is satisfactory when the outside temperature is low, the buffer tank can be fitted with an additional immersion heater that also will function as an extra back-up in the event of operational failure or when the installation is serviced (for example bio, gas or oil).

A ground source heat pump will normally have a higher cost of installation than for example an air/water heat pump, but the heat it provides corresponds to the need for heating and also the yearly COP is higher.


The heat pump gets its heat through a frost free liquid from for example a 200 metres deep bore hole or a 400 metres long plastic hose which is dug into the ground (typically for a villa). Normally, the temperature of the heat source does not vary significantly throughout the year and thus, the heat pump is highly suitable for areas with cold winters (typical inland climate). The heat is transferred to water which can further be used for space and/or tap water heating. One of the big advantages of the ground source heat pumps is that most of the energy sources they utilize can be used for passive cooling in the summer.

Airsource Heat Pumps
Solar Collectors