DC Inverter air-to-water heat pumps S-THERM 3

DC Inverter air-to-water heat pumps S-THERM 3

Air-to-water heat pump takes heat from the outdoor air and transfers it to the water which is then used for heating of a house or domestic hot water. Modern heat pump can take heat from air even at low ambient temperatures, so it can work almost all year-round.

S-THERM heat pump is designed for providing hot water for heating in the winter but it can also provide cold water for cooling in summer. If you use fan-coil units, this heat pump can be used for cooling and heating. There is no need for independent air-conditioning unit.

Why to choose our heat pump

Because our S-THERM heat pumps adopt DC inverter technology, the compressor can adapt its power to meet actual requirements. This prevents from overheating the house, mainly if outdoor temperatures are around 0 °C. Inverter technology is the main advantage over heat pumps with an on/off compressor which runs at their maximum capacity all the time.

The compressor is located in the outdoor unit, so indoor unit is as quiet as possible. A water pump is the only one moving component in the indoor unit.


  • DC Inverter compressor
  • Tecomat color touch display
  • Wilo water pump
  • Integrated expansion tank and safety valve
  • Electronic expansion valve
  • Refrigerant R410A
  • Integrated 6 kW electric heater
  • Outlet water temperature 55°C
  • Remote control via internet

Complex control system

Not only the refrigerant circuit, but also the heating system can be both controlled by control system of the heat pump. User can use equitherm regulation, which accommodates the outlet water temperature according to the outdoor temperature. When outdoor temperatures are higher, the heat pump will provide lower water temperature, will work with better COP and rooms will not be overheated.

In the summer, the control system can close valves to radiator or floor-heating and use only fan coil units for cooling. Therefore, these units can provide comfort all year-round, in winter and in summer.

Advantages of products

Indoor unit

  • Wall mounted - it takes less space than stationary units
  • Integrated expansion tank and safety valve
  • User-friendly interface
  • Backlighted display
  • 6 kW integrated e-heater
  • Very quiet operation
  • Automatic air vent valve
  • Easy installation

Outdoor unit

  • Optimized fan grille for better efficiency
  • Connection valves inside the unit - nicer, undisturbed appearance of the unit
  • Large surface of the evaporator for more effective heat transfer
  • Insulated components to prevent from frosting
  • Low noise operation

The device contains fluorinated greenhouse gases covered by the Kyoto Protocol. Used refrigerant R410A (50% HFC-32, 50% HFC-125), GWP 2088, environmentally friendly.


Our Clients And Business Partners

Our strength is quality products with reasonable price setting. We have very wide product range, with very good stock availability whole year round. We put emphasis on aftersales service, spare parts availability and technical support, also we provide technical trainings. With our partners we create long term, mutually benefitial business cooperation.

EPCOS, ABB, O2, E.ON, Ferona, Systemair

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