versusindex
INT
Heat pumps · INT

CTC GS 608

The CTC GS 608 is a heat pump with SCOP (35 °C) 4.85 and refrigerant R407C.1,2

Last updated: Technical specifications⇄ Compare this model
Search this model
SCOP (35 °C)
4.852

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
9kW2
Official source
Rated output 55 °C
9kW2
Official source

Technical specifications

General
Type (source)Ground source1
Performance
Rated output 35 °C9 kW2
Rated output 55 °C9 kW2
Efficiency
SCOP (35 °C)4.852
SCOP (55 °C)3.752
Seasonal efficiency ηs 35 °C191 %2
Seasonal efficiency ηs 55 °C147 %2
Energy label 35 °CA+++2
Energy label 55 °CA++2
Noise
Indoor unit sound power39 dB(A)2
Refrigerant
RefrigerantR407C1
Refrigerant GWP1,7741
Refrigerant charge1.9 kg1

How it ranks

SCOP (35 °C): better than 13% of comparable models in our database (Heat pumps · Ground source · 8–10 kW; n = 22).

Rank 18 of 23

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.

More from CTC

All CTC models (17) →

How we collect and check this data →

Frequently asked questions

What is the SCOP (35 °C) of the CTC GS 608?

The SCOP (35 °C) of the CTC GS 608 is 4.85.1,2

Which refrigerant does the CTC GS 608 use?

The refrigerant of the CTC GS 608 is R407C.1,2

Sources

  1. Heat Pump Keymark certificates — EHPA / DIN CERTCO (Heat Pump KEYMARK) · accessed Sep 29, 2026
  2. European Product Registry for Energy Labelling (EPREL) – heat pumps — Europese Commissie · accessed Oct 18, 2026