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BrötjeBLW Eco-KP 4.2

Brötje BLW Eco-KP 4.2
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The Brötje BLW Eco-KP 4.2 is an air-to-water heat pump with a SCOP of 5.34 (35 °C) and a sound power level of 48 dB(A).1

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SCOP (35 °C)
5.341

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

Outdoor unit sound power
48dB(A)1
Official source
Refrigerant
R2901
Official source
Type (source)
Air-to-water1
Official source
Rated output 35 °C
5.3kW1
Official source

Technical specifications

General
Type (source) Air-to-water1
Compressors 11
Capacity control Inverter1
Performance
Rated output 35 °C 5.3 kW1
Rated output 55 °C 4.9 kW1
Efficiency
SCOP (35 °C) 5.341
SCOP (55 °C) 41
Seasonal efficiency ηs 35 °C 210 %1
Seasonal efficiency ηs 55 °C 157 %1
COP A7/W35 5.171
COP A2/W35 4.11
COP A-7/W35 3.21
Noise
Outdoor unit sound power 48 dB(A)1
Indoor unit sound power 31.7 dB(A)1
Refrigerant
Refrigerant R2901
Refrigerant charge 0.7 kg1
Electrical
Max. power input 2.7 kW1
Connectivity & smart
SG Ready Yes1

Manufacturer documentation

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

Frequently asked questions

Which refrigerant does the Brötje BLW Eco-KP 4.2 use?

The Brötje BLW Eco-KP 4.2 uses R290.1

Sources

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