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AxenKS-40W/EN7BP

The Axen KS-40W/EN7BP is an air-to-water heat pump with a SCOP of 5.21 (35 °C) and a sound power level of 53 dB(A).1,2

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SCOP (35 °C)
5.211

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

Heating capacity (A7/W35)
4kW2
Official source
Outdoor unit sound power
53dB(A)1
Official source
Refrigerant
R2901
Official source
Type (source)
Air-to-water1
Official source

Technical specifications

General
Type (source) Air-to-water1
Compressors 11
Capacity control drehzahlregelung1
Performance
Heating capacity (A7/W35) 4 kW2
Rated output 35 °C 4.2 kW1
Rated output 55 °C 4.4 kW1
Efficiency
SCOP (35 °C) 5.211
SCOP (55 °C) 3.851
Seasonal efficiency ηs 35 °C 205 %1
Seasonal efficiency ηs 55 °C 151 %1
Energy label 35 °C A, , , 2
Energy label 55 °C A, , , 2
COP A7/W35 6.471
COP A2/W35 5.191
COP A-7/W35 3.571
Noise
Outdoor unit sound power 53 dB(A)1
Refrigerant
Refrigerant R2901
Refrigerant GWP 32
Refrigerant charge 0.61 kg1
Electrical
Max. power input 4.9 kW1
Connectivity & smart
SG Ready Yes1

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Frequently asked questions

Which refrigerant does the Axen KS-40W/EN7BP use?

The Axen KS-40W/EN7BP uses R290.1,2

Sources

  1. List of eligible heat pumps (BEG) — Bundesamt für Wirtschaft und Ausfuhrkontrolle (BAFA) · accessed 27 Sept 2026
  2. Heat Pump Keymark certificates — EHPA / DIN CERTCO (Heat Pump KEYMARK) · accessed 29 Sept 2026