Vaillant vs Mitsubishi Electric - Which Heat Pump Is Better for UK Homes?
Independent head-to-head comparison. Updated April 2026.
Score breakdown
8.5
Efficiency (SCOP)
9
9
Reliability
9.2
8.5
Installation
8
8.5
After-sales support
8.8
7.8
Value for money
8.2
1
categories won by Vaillant
vs
4
categories won by Mitsubishi Electric
Vaillant - installed price (post-grant)
£4,500 - £9,000
After £7,500 BUS grant. Includes installation.
BUS Grant: £7,500Mitsubishi Electric - installed price (post-grant)
£4,000 - £9,500
After £7,500 BUS grant. Varies by installer.
BUS Grant: £7,500Which wins for...
Maximum efficiency
ME
Mitsubishi Electric
Higher SCOP rating (9/10)
Best value for money
ME
Mitsubishi Electric
Better value score (8.2/10) and typically lower installed cost
Long-term reliability
ME
Mitsubishi Electric
Higher reliability score (9.2/10)
Easiest installation
V
Vaillant
Better installer compatibility score (8.5/10)
After-sales support
ME
Mitsubishi Electric
Stronger UK support network (8.8/10)
ME
Our verdict
Mitsubishi Electric wins overall
Mitsubishi Electric scores 9/10 overall - higher than Vaillant (8.8/10). However, the best choice depends on your specific priorities. Vaillant may be a better fit if you prioritise installer choice.
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Important disclaimer
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.