Heat pumps · MT

NIBES1155-25

The NIBE S1155-25 is a heat pump with SCOP (35 °C) 7.32 and refrigerant R410A.^1,2

Last updated: 29 September 2026 Technical specifications ⇄ Compare this model

SCOP (35 °C): 7.32²

Seasonal efficiency: how much heat you get per kWh of electricity across a heating season.
Refrigerant: R410A²

Official source
Type (source): Ground source²

Official source
Rated output 35 °C: 34kW²

Official source
Rated output 55 °C: 31kW²

Official source

Technical specifications

General
Type (source)	Ground source²
Performance
Rated output 35 °C	34 kW²
Rated output 55 °C	31 kW²
Efficiency
SCOP (35 °C)	7.32²
SCOP (55 °C)	5.14²
Seasonal efficiency ηs 35 °C	285 %²
Seasonal efficiency ηs 55 °C	197 %²
Energy label 35 °C	A, , , ²
Energy label 55 °C	A, , , ²
Noise
Indoor unit sound power	47 dB(A)²
Refrigerant
Refrigerant	R410A²
Refrigerant GWP	2,088²
Refrigerant charge	2.1 kg²
Grants & market
ISDE grant (NL)	6,675 €¹

Manufacturer documentation

Product page (nibe.eu)
Brochure / leaflet — NIBE S1155 – Product leaflet (PBD) (assetstore.nibe.se)
Manual — NIBE S1155 – Installer manual (IHB) (assetstore.nibe.se)

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

Frequently asked questions

What is the SCOP (35 °C) of the NIBE S1155-25?

The SCOP (35 °C) of the NIBE S1155-25 is 7.32.^1,2

Which refrigerant does the NIBE S1155-25 use?

The refrigerant of the NIBE S1155-25 is R410A.^1,2

Sources

ISDE heat pump notification code list — Rijksdienst voor Ondernemend Nederland (RVO) · accessed 27 Sept 2026
Heat Pump Keymark certificates — EHPA / DIN CERTCO (Heat Pump KEYMARK) · accessed 29 Sept 2026

Key figures