Highly efficient brine-to-water heat pump for indoor installation. 35 kW heat output.

Highly efficient use of the ground.

The SI 35TU is a highly efficient brine-to-water heat pump with 35 kW heat output. Installed indoors, it is the most efficient solution for newly built single family homes and apartment blocks, as well as renovations, with a heated living area of up to 780 sqm. The universal design means that domestic hot water preparation can also be connected with this series.

  • Naturally quiet. Sound-optimised through insulated metal casing and double vibration-isolated compressor.
  • Low operating costs. High seasonal performance factors thanks to economizer and sensor monitoring of the refrigeration circuit for high operational reliability and integrated thermal energy metering.
  • Expansion options. Bivalent or bivalent-renewable operation, distribution systems with mixed and unmixed heating circuits (e.g. underfloor heating and radiators). Even more efficient room temperature control Smart-RTC+.
  • Future-orientated. Use of load-variable tariffs or self-produced PV-electricity possible: SmartGrid Ready.
  • Intelligent. Eligible for funding in existing buildings thanks to high efficiency. Suitable for use in new builds for compliance with the German federal energy efficiency ordinance (EnEV) and Renewable Energy Heat Act (EEWärmeG).
  • Adjustable. Including for special applications, such as use with a heat source temperature up to –10 °C.
  • Excellent efficiency values. Demand-based regulation via two compressors in the refrigeration circuit – if only one is required, the other switches off.
  • Technical Data.

    Energy efficiency class* with 35 °C flow temperature: A+++

    Heat output B0/W35: 18,4 kW

    COP B0/W35: 5,2

    Heat output max. B0/W35: 34,8 kW

    COP B0/W35: 4,8

    Lower operating limit heat source (heating operation): -5 Grad

    Upper operating limit heat source (heating operation): 25 Grad

    Max. flow temperature: 62 Grad

    Sound pressure level in 1 m (indoors): 42 dB(A)

    Width: 1000 mm

    Height: 885 mm

    Depth: 810 mm

    Weight: 315 kg

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