Nibe F1255 (1.5–6 kW)

Specifications and technical data

Also known as: F1255-6 1x230V UK

✓ BUS eligibleGround Source (GSHP)ResidentialR407C1.5–6 kW

Manufacturer	Nibe
Model	F1255
Model code	F1255 - 6
Heat pump type	Ground Source (GSHP) All Ground Source heat pumps →
Application	Residential All Residential heat pumps →
Refrigerant	R407C All R407C heat pumps →
Mode	Heating only
Heating capacity	1.5–6 kW
Max heating output (low temp)	3.15 kW at B0/W35
COP (heating)	4.72 at B0/W35
SCOP (heating)	5.2 at W35
Heating flow temperature	up to 70 °C
Electrical supply	220-240V (Single Phase)
Dimensions (H×W×D)	1800 × 600 × 620 mm
Operational Weight	200 kg
Sound power level	42 dB(A) (Sound Power LW(A))
Data added	2026-10-20
Data source	NIBE F1255 UK 1x230V installation manual IHB EN 2008-5 331335
Verification	Verified by a human
Boiler Upgrade Scheme	✓ BUS eligible — Listed on the Ofgem BUS Product Eligibility List (24 Sep 2026). Grant also needs an MCS-certified installer and a qualifying system design. Funding guide
PEL certificate no.	012-047 / issue 2
MCS certification	✓ MCS listed
MCS certificate no.	012-047 / issue 2

Free data sheet (PDF) →

NIBE F1255-6 inverter ground source heat pump with integrated 180 L hot water heater, 1.5-6 kW, R407C, single-phase 230 V (UK).

Where to buy (UK)

UK Supplier	Baxter Heat Pumps
UK Supplier	IMS Heat Pumps

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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.