Viessmann vs Bosch - Which Heat Pump Is Better for UK Homes?
Independent head-to-head comparison. Updated April 2026.
Score breakdown
8.8
Efficiency (SCOP)
8
8.9
Reliability
8.2
7.8
Installation
8.8
8
After-sales support
8.5
7.5
Value for money
8
2
categories won by Viessmann
vs
3
categories won by Bosch
Viessmann - installed price (post-grant)
£5,000 - £10,000
After £7,500 BUS grant. Premium German specification.
BUS Grant: £7,500Bosch - installed price (post-grant)
£3,800 - £8,000
After £7,500 BUS grant. Includes installation.
BUS Grant: £7,500Which wins for...
Maximum efficiency
Vi
Viessmann
Higher SCOP rating (8.8/10)
Best value for money
Bo
Bosch
Better value score (8/10) and typically lower installed cost
Long-term reliability
Vi
Viessmann
Higher reliability score (8.9/10)
Easiest installation
Bo
Bosch
Better installer compatibility score (8.8/10)
After-sales support
Bo
Bosch
Stronger UK support network (8.5/10)
Vi
Our verdict
Viessmann wins overall
Viessmann scores 8.7/10 overall - higher than Bosch (7.9/10). However, the best choice depends on your specific priorities. 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.