Heat pumps · INT

CTC GS 606

The CTC GS 606 is a heat pump with SCOP (35 °C) 4.6 and refrigerant R407C.^1,2

Last updated: October 15, 2026Technical specifications ⇄ Compare this model

SCOP (35 °C): 4.6²
Seasonal efficiency: how much heat you get per kWh of electricity across a heating season.
Refrigerant: R407C¹
Official source
Type (source): Ground source¹
Official source
Rated output 35 °C: 7kW²
Official source
Rated output 55 °C: 6kW²
Official source

Technical specifications

General
Type (source)	Ground source¹
Performance
Rated output 35 °C	7 kW²
Rated output 55 °C	6 kW²
Efficiency
SCOP (35 °C)	4.6²
SCOP (55 °C)	3.58²
Seasonal efficiency ηs 35 °C	181 %²
Seasonal efficiency ηs 55 °C	140 %²
Energy label 35 °C	A+++²
Energy label 55 °C	A++²
Noise
Indoor unit sound power	41 dB(A)²
Refrigerant
Refrigerant	R407C¹
Refrigerant GWP	1,774¹
Refrigerant charge	1.9 kg¹

How it ranks

SCOP (35 °C): better than 23% of comparable models in our database (Heat pumps · Ground source · 6–8 kW; n = 38).

Rank 27 of 39

Compared with every model on VersusIndex in the same group with a known value; equal values do not count as better. This says nothing about price, installation or reliability.

Similar models

Other brands, same type and a comparable size.

Frequently asked questions

What is the SCOP (35 °C) of the CTC GS 606?

The SCOP (35 °C) of the CTC GS 606 is 4.6.^1,2

Which refrigerant does the CTC GS 606 use?

The refrigerant of the CTC GS 606 is R407C.^1,2

Sources

Heat Pump Keymark certificates — EHPA / DIN CERTCO (Heat Pump KEYMARK) · accessed Sep 29, 2026
European Product Registry for Energy Labelling (EPREL) – heat pumps — Europese Commissie · accessed Oct 15, 2026

Key figures