Worcester Bosch vs Viessmann - Which Heat Pump Is Better for UK Homes?
Independent head-to-head comparison. Updated April 2026.
Score breakdown
7.8
Efficiency (SCOP)
8.8
8
Reliability
8.9
9.5
Installation
7.8
9
After-sales support
8
8.3
Value for money
7.5
3
categories won by Worcester Bosch
vs
2
categories won by Viessmann
Worcester Bosch - installed price (post-grant)
£3,500 - £8,000
After £7,500 BUS grant. Widest installer network in UK.
BUS Grant: £7,500Viessmann - installed price (post-grant)
£5,000 - £10,000
After £7,500 BUS grant. Premium German specification.
BUS Grant: £7,500Which wins for...
Maximum efficiency
Vi
Viessmann
Higher SCOP rating (8.8/10)
Best value for money
WB
Worcester Bosch
Better value score (8.3/10) and typically lower installed cost
Long-term reliability
Vi
Viessmann
Higher reliability score (8.9/10)
Easiest installation
WB
Worcester Bosch
Better installer compatibility score (9.5/10)
After-sales support
WB
Worcester Bosch
Stronger UK support network (9/10)
Vi
Our verdict
Viessmann wins overall
Viessmann scores 8.7/10 overall - higher than Worcester Bosch (7.8/10). However, the best choice depends on your specific priorities. Worcester Bosch may be a better fit if you prioritise value for money.
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Important disclaimer
www.heatpumpcompared.co.uk is editorially independent and not affiliated with any heat pump manufacturer or installer. We do not provide heating advice. Prices, specifications, SCOP ratings and grant amounts are correct as of April 2026 but are subject to change. Always commission a professional heat loss survey before purchasing a heat pump system.