D
Daikin
Japanese precision, European-designed for UK homes
BUS Grant: £7,500BUS EligibleMCS Approved
8.6
Overall score
out of 10
Daikin is a excellent choice for UK homeowners. From Japan, founded 1924. Heat output range: 4 kW - 16 kW. SCOP: Up to 4.6. Noise: 40-48 dB.
Key specifications
OriginJapan
Founded1924
Heat output4 kW - 16 kW
Max SCOPUp to 4.6
Noise level40-48 dB
Warranty5 years
Score breakdown
Efficiency (SCOP)
8.8
Reliability
8.8
Installation
8.2
After-sales support
8.5
Value for money
8
Post-grant installed price
£4,200 - £9,000
After £7,500 BUS grant.
+Pros
- Highest SCOP ratings in class
- Altherma 3 designed specifically for European retrofit
- Excellent low-temperature performance
- Strong D1 network of trained installers
- Premium build quality
-Cons
- Premium pricing similar to Vaillant
- D1 installer requirement limits choice
- Less intuitive controls interface
Best for
Energy efficiency priorityWell-insulated homesLong-term owners
Not ideal for
Budget-conscious buyersUrgently needed installs
Top models
| Model | Heat output | SCOP | Approx. installed price |
|---|---|---|---|
| Altherma 3 4kW | 4 kW | 4.6 | £5,000-7,500 installed |
| Altherma 3 8kW | 8 kW | 4.3 | £6,500-9,000 installed |
| Altherma 3 14kW | 14 kW | 4.1 | £8,000-12,000 installed |
Prices shown include installation and are after the £7,500 BUS grant where applicable. Correct as of April 2026.
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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.