High temperature heat pumps

Even if your home is not suitable for low-temperature heating either because of building age, insulation thickness, or radiator heating, hightemperature heat pumps are still and energy-efficient alternative to the conventional high-temperature systems that use oil, gas or wood as fuel. The operating principle for a hightemperature heat pump is actually the same as for a lowtemperature one. This applies both to capture of heat (brine or ground water) and energy and economic efficiency of heat pump operation. At standard measurement conditions, high temeprature heat pumps  reach the coefficient of performance (COP) of 4.4 to 4.5 for TERRAGOR and from 5,4 to 5,5 for AQUAGOR models.

The key difference is in allowing the heating water temperature to rise to 62°C which in turn also allows normal operation of heating systems that employ radiators. Hightemperature heat pumps can reach higher heating water temperatures (62°C) by employing special “heating” compressors which inject the refrigerant into the compressor head, and due to larger heat exchangers (condenser and evaporator units).


The powerful compressor and larger heat exchangers allow the Terragor hightemperature heat pump to reach high coefficients of performance even in systems with radiator heating. The high-temperature Terragor heat pump is appropriate for use in a heating system with a ground collector or a vertical borehole.

Spiral evaporator – developed especially for the Aquagor water/water heat pump allows installing the water/water system without an extra pre-exchanger, which increases the annual COP for the entire system. The spiro evaporator is resistant to oxidation and corrosion, and it is protected from accumulation of impurities.

High temperature heat pumps are particularly useful in the following

  • older buildings, insulated in accordance with the thenapplicable standards, where the insulation does not entirely meet the requirements for lowtemperature heat pumps and the cost of additional insulation would be economically unjustified;
  • buildings where installation of oversized radiators is either not possible or not economical;
  • buildings under monument protection;
  • buildings which cannot have proper rehabilitation of the insulation system for various other reasons (unified appearance of the street, large glass surfaces, etc.).