Vaillant geoTHERM (21.5 kW)

Specifications and technical data

Ground Source (GSHP)CommercialR407C21.5 kW

Manufacturer	Vaillant
Model	geoTHERM
Model code	VWS220/3
Heat pump type	Ground Source (GSHP)
Application	Commercial
Refrigerant	R407C
Mode	Heating only
Heating capacity	21.5 kW
Max heating output (low temp)	20.1 kW at B0/W55
COP (heating)	4.4 at B0/W35
Operating range (air)	-10 to 20 °C
Heating flow temperature	25–62 °C
Electrical supply	380-415V (Three Phase)
Dimensions (H×W×D)	1200 × 760 × 900 mm
Operational Weight	341 kg
Sound power level	54 dB(A) (Sound Power LW(A))
Data added	2026-07-02
Data source	Manufacturer Data Sheet
MCS certification	✓ MCS listed — eligible for Boiler Upgrade Scheme (MCS-certified install required)
MCS certificate no.	KIWA 00023/024 HP
MCS listing	View on MCS ↗

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Vaillant geoTHERM is a 21.5 kW ground source heat pump, using R407C refrigerant.

Where to buy (UK)

UK Supplier	The Heat Pump Warehouse
UK Supplier	Secon Renewables
UK Supplier	City Plumbing
UK Supplier	Pirate Heating Supplies
UK Supplier	Eco Wizard

✓ Manually verified by Heat Pump Database

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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.