Baxi
British brand with the UK's widest engineer network
Baxi is a solid choice for UK homeowners. From UK, founded 1866. Heat output range: 5 kW - 12 kW. SCOP: Up to 3.9. Noise: 40-52 dB.
Key specifications
Score breakdown
+Pros
- 156 years of UK heating experience
- Extensive UK engineer and service network
- Competitive post-grant pricing
- Familiar brand for existing Baxi boiler owners
- Strong parts availability across the UK
-Cons
- SCOP ratings lower than Japanese or premium German brands
- Heat pump range less mature than boiler range
- Limited output range (max 12 kW)
Best for
Not ideal for
Top models
| Model | Heat output | SCOP | Approx. installed price |
|---|---|---|---|
| Assure ASH 5kW | 5 kW | 3.9 | £4,000-6,000 installed |
| Assure ASH 8kW | 8 kW | 3.8 | £5,500-7,500 installed |
| Assure ASH 12kW | 12 kW | 3.6 | £7,000-9,500 installed |
Prices shown include installation and are after the £7,500 BUS grant where applicable. Correct as of April 2026.
Baxi heat pump - common questions
Baxi has 156 years of UK heating experience and is a trusted household name. Their Assure ASH heat pump range is MCS-approved and BUS-eligible. While SCOP ratings (up to 3.9) are lower than Japanese and premium European brands, Baxi's strengths are their wide UK engineer network and competitive pricing.
The Baxi Assure ASH achieves SCOP up to 3.9 on the 5 kW model. This is below Japanese brands (Mitsubishi 4.5, Daikin 4.6) but comparable to Worcester Bosch Greenstar (3.9). For buyers prioritising installer availability and affordability over maximum efficiency, Baxi is a viable choice.
Yes. Baxi Assure ASH heat pumps are MCS-approved and eligible for the £7,500 BUS grant. Baxi has one of the largest networks of Gas Safe engineers in the UK, many of whom are also MCS-certified.
The Baxi Assure ASH range tops out at 12 kW. This covers most 3-4 bedroom properties, but is not suitable for large detached houses or those with significant heat loss. If your heat loss survey indicates 14 kW+ is required, consider Mitsubishi Ecodan, Daikin or Nibe instead.
Getting quotes for a Baxi heat pump?
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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.