Nibe S1256

Specifications and technical data

Ground Source (GSHP)ResidentialR454B1.5–8 kW

Manufacturer	Nibe
Model	S1256
Model code	S1256-8
Heat pump type	Ground Source (GSHP)
Application	Residential
Refrigerant	R454B
Mode	Heating only
Heating capacity	1.5–8 kW
COP	5.05 at B0/W35
SCOP	5.67 at W55
Operating range (air)	from -12 °C
Flow temperature	up to 70 °C
Power input	0.56 kW
Dimensions (H×W×D)	1800 × 600 × 620 mm
Weight	211 kg
Sound power level	43 dB(A) (Sound power LWA EN12102 at B0/W35; range shown in source)
Data added	2026-06-12
Data source	NIBE installer manuals / technical data

Notes

R454B inverter-controlled ground source heat pump with integrated domestic hot water cylinder.

Part no. 065894. EN14511 B0/W35 nominal: capacity 2.85 kW, power input 0.56 kW, COP 5.05. Output range 1.5-8 kW. SCOP average climate 35/55°C 5.67/4.26. R454B charge 1.15 kg. Max supply line factory setting 70°C; compressor working range provides up to 65°C at -5°C incoming brine. Integrated 173 litre water heater; tap volume 40°C comfort mode 235/250/275 L; COPDHW XL 3.0.

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Data is compiled from manufacturer sources and may contain errors or gaps. Always confirm specifications with the manufacturer before making decisions.