Viessmann Vitocal 222-G

Specifications and technical data

Also known as: BWT 221.B10

✓ BUS eligibleGround Source (GSHP)ResidentialR410A10.4 kW

Manufacturer	Viessmann
Model	Vitocal 222-G
Model code	BWT-M 221.B10
Heat pump type	Ground Source (GSHP) All Ground Source heat pumps →
Application	Residential All Residential heat pumps →
Refrigerant	R410A All R410A heat pumps →
Mode	Heating only
Heating capacity	10.4 kW
Max heating output (low temp)	10.4 kW at B0/W35
COP (heating)	4.8 at B0/W35
Operating range (air)	-10 to 25 °C
Heating flow temperature	up to 65 °C
Electrical supply	220-240V (Single Phase)
Dimensions (H×W×D)	2000 × 600 × 680 mm
Operational Weight	288 kg
Sound power level	45 dB(A) (Sound Power LW(A))
Data added	2026-09-26
Data source	Manufacturer documentation (Viessmann)
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.	011-1W0290
MCS certification	✓ MCS listed
MCS certificate no.	011-1W0290

Free data sheet (PDF) →

View manufacturer page →

Viessmann Vitocal 222-G BWT-M 221.B10, brine-to-water heat pump, R410A. 10.4 kW at B0/W35 with a COP of 4.8. Flow to 65 C.

Where to buy (UK)

UK Supplier	Secon Renewables
UK Supplier	Pirate Heating Supplies
UK Supplier	Beet BG
UK Supplier	GetPlumb
UK Supplier	Solar Trading

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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.