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SwegonSIGMA Zero Hi OH 25

Swegon SIGMA Zero Hi OH 25
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The Swegon SIGMA Zero Hi OH 25 is a heat pump with SCOP (35 °C) 5.96 and refrigerant R290.1

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SCOP (35 °C)
5.961

Seasonal efficiency: how much heat you get per kWh of electricity across a heating season.

Refrigerant
R2901
Official source
Type (source)
Water-to-water1
Official source
Rated output 35 °C
34kW1
Official source
Rated output 55 °C
31kW1
Official source

Technical specifications

General
Type (source) Water-to-water1
Compressors 11
Capacity control drehzahlregelung1
Performance
Rated output 35 °C 34 kW1
Rated output 55 °C 31 kW1
Efficiency
SCOP (35 °C) 5.961
SCOP (55 °C) 4.551
Seasonal efficiency ηs 35 °C 230 %1
Seasonal efficiency ηs 55 °C 174 %1
Noise
Indoor unit sound power 76.9 dB(A)1
Refrigerant
Refrigerant R2901
Refrigerant charge 0.7 kg1
Electrical
Max. power input 16.5 kW1
Connectivity & smart
SG Ready Yes1

Manufacturer documentation

  • Product page (swegon.com)
  • Brochure / leaflet — SIGMA Zero – Kaltwassererzeuger und Wärmepumpen mit R290, 20–70 kW (Broschüre) (swegon.com, PDF)

External links to Swegon's official website. The manufacturer may change or move documents; where they differ, the manufacturer's latest version applies.

Frequently asked questions

What is the SCOP (35 °C) of the Swegon SIGMA Zero Hi OH 25?

The SCOP (35 °C) of the Swegon SIGMA Zero Hi OH 25 is 5.96.1

Which refrigerant does the Swegon SIGMA Zero Hi OH 25 use?

The refrigerant of the Swegon SIGMA Zero Hi OH 25 is R290.1

Sources

  1. List of eligible heat pumps (BEG) — Bundesamt für Wirtschaft und Ausfuhrkontrolle (BAFA) · accessed 27 Sept 2026