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CTAOptiheat Inverta 4esr TWW (Wasser / Wasser)

The CTA Optiheat Inverta 4esr TWW (Wasser / Wasser) is a heat pump with SCOP (35 °C) 7.2 and refrigerant R410A.1

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SCOP (35 °C)
7.21

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

Refrigerant
R410A1
Official source
Type (source)
Water-to-water1
Official source
Rated output 35 °C
9.5kW1
Official source
Rated output 55 °C
8.1kW1
Official source

Technical specifications

General
Type (source) Water-to-water1
Compressors 11
Capacity control drehzahlregelung1
Performance
Rated output 35 °C 9.5 kW1
Rated output 55 °C 8.1 kW1
Efficiency
SCOP (35 °C) 7.21
SCOP (55 °C) 4.81
Seasonal efficiency ηs 35 °C 280 %1
Seasonal efficiency ηs 55 °C 184 %1
Noise
Indoor unit sound power 44 dB(A)1
Refrigerant
Refrigerant R410A1
Refrigerant charge 1.4 kg1
Electrical
Max. power input 2.6 kW1
Connectivity & smart
SG Ready Yes1

Frequently asked questions

What is the SCOP (35 °C) of the CTA Optiheat Inverta 4esr TWW (Wasser / Wasser)?

The SCOP (35 °C) of the CTA Optiheat Inverta 4esr TWW (Wasser / Wasser) is 7.2.1

Which refrigerant does the CTA Optiheat Inverta 4esr TWW (Wasser / Wasser) use?

The refrigerant of the CTA Optiheat Inverta 4esr TWW (Wasser / Wasser) is R410A.1

Sources

  1. List of eligible heat pumps (BEG) — Bundesamt für Wirtschaft und Ausfuhrkontrolle (BAFA) · accessed 29 Sept 2026