Heat pumps · INT

Kronoterm ETERA M-1 HT / HK 3F E (W/W)

The Kronoterm ETERA M-1 HT / HK 3F E (W/W) is a heat pump with SCOP (35 °C) 7.9 and refrigerant R452B.^1,2

Last updated: October 18, 2026Technical specifications ⇄ Compare this model

SCOP (35 °C): 7.9²
Seasonal efficiency: how much heat you get per kWh of electricity across a heating season.
Refrigerant: R452B¹
Official source
Type (source): Water-to-water¹
Official source
Rated output 35 °C: 12kW²
Official source
Rated output 55 °C: 12kW²
Official source

Technical specifications

General
Type (source)	Water-to-water¹
Performance
Rated output 35 °C	12 kW²
Rated output 55 °C	12 kW²
Efficiency
SCOP (35 °C)	7.9²
SCOP (55 °C)	5.4²
Seasonal efficiency ηs 35 °C	313 %²
Seasonal efficiency ηs 55 °C	213 %²
Energy label 35 °C	A+++²
Energy label 55 °C	A+++²
Noise
Indoor unit sound power	32 dB(A)²
Refrigerant
Refrigerant	R452B¹
Refrigerant GWP	675¹
Grants & market
ISDE grant (NL)	4,725 €¹

Manufacturer documentation

Product page (kronoterm.eu)

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

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Frequently asked questions

What is the SCOP (35 °C) of the Kronoterm ETERA M-1 HT / HK 3F E (W/W)?

The SCOP (35 °C) of the Kronoterm ETERA M-1 HT / HK 3F E (W/W) is 7.9.^1,2

Which refrigerant does the Kronoterm ETERA M-1 HT / HK 3F E (W/W) use?

The refrigerant of the Kronoterm ETERA M-1 HT / HK 3F E (W/W) is R452B.^1,2

Sources

ISDE heat pump notification code list — Rijksdienst voor Ondernemend Nederland (RVO) · accessed Sep 28, 2026
European Product Registry for Energy Labelling (EPREL) – heat pumps — Europese Commissie · accessed Oct 18, 2026

Key figures