Vaillant Boilers
Combi & System Boiler Installation & Replacement (UK)
Vaillant boilers are a premium choice for many UK homeowners, known for high efficiency, strong build quality and a wide range of combi, system and regular models. Whether you’re replacing an ageing boiler or upgrading to improve performance and running costs, Vaillant offers options suited to everything from compact homes to larger properties with higher hot water demand.
On this page you can explore Vaillant boiler models with clear, comparable details to help you shortlist the right fit for your home. If you’re not sure where to start, consider your current boiler type and how you use hot water day-to-day (number of bathrooms, simultaneous showers, etc.) — we’ll help guide you towards a suitable Vaillant boiler and a straightforward installation package.
Recommended Boilers
Ecofit Pure 412
- Regular Gas Boiler
- 12.3kW
- Band rating: A
- ERP rating: A
- Warranty: 10 years
Ecofit Pure 415
- Regular Gas Boiler
- 15.2kW
- Band rating: A
- ERP rating: A
- Warranty: 10 years
Ecofit Pure 418
- Regular Gas Boiler
- 18.3kW
- Band rating: A
- ERP rating: A
- Warranty: 10 years
Ecofit Pure 425
- Regular Gas Boiler
- 25.4kW
- Band rating: A
- ERP rating: A
- Warranty: 10 years
Ecofit Pure 430
- Regular Gas Boiler
- 30.5kW
- Band rating: A
- ERP rating: A
- Warranty: 10 years
Ecofit Pure 435
- Regular Gas Boiler
- 34.8kW
- Band rating: A
- ERP rating: A
- Warranty: 10 years
Ecofit Pure 612
- System Gas Boiler
- 12.3kW
- Band rating: A
- ERP rating: A
- Warranty: 10 years
Ecofit Pure 615
- System Gas Boiler
- 15.2kW
- Band rating: A
- ERP rating: A
- Warranty: 10 years
Ecofit Pure 618
- System Gas Boiler
- 18.3kW
- Band rating: A
- ERP rating: A
- Warranty: 10 years
Ecofit Pure 625
- System Gas Boiler
- 25.4kW
- Band rating: A
- ERP rating: A
- Warranty: 10 years
Ecofit Pure 630
- System Gas Boiler
- 30.5kW
- Band rating: A
- ERP rating: A
- Warranty: 10 years
Ecofit Pure 825
- Combi Gas Boiler
- 25kW
- Band rating: A
- ERP rating: A
- Warranty: 10 years
Ecofit Pure 830
- Combi Gas Boiler
- 30kW
- Band rating: A
- ERP rating: A
- Warranty: 10 years
Ecofit Pure 835
- Combi Gas Boiler
- 35kW
- Band rating: A
- ERP rating: A
- Warranty: 10 years
Ecotec + 412
- Regular Gas Boiler
- 12.3kW
- Band rating: A
- ERP rating: A
- Warranty: 10 years
Ecotec + 415
- Regular Gas Boiler
- 15.1kW
- Band rating: A
- ERP rating: A
- Warranty: 10 years
Ecotec + 418
- Regular Gas Boiler
- 18.3kW
- Band rating: A
- ERP rating: A
- Warranty: 10 years
Ecotec + 424
- Regular Gas Boiler
- 24.6kW
- Band rating: A
- ERP rating: A
- Warranty: 10 years
Ecotec + 430
- Regular Gas Boiler
- 30.5kW
- Band rating: A
- ERP rating: A
- Warranty: 10 years
Ecotec + 435
- Regular Gas Boiler
- 35.1kW
- Band rating: A
- ERP rating: A
- Warranty: 10 years
Ecotec + 610
- System Gas Boiler
- 10.6kW
- Band rating: A
- ERP rating: A
- Warranty: 10 years
Ecotec + 615
- System Gas Boiler
- 15.9kW
- Band rating: A
- ERP rating: A
- Warranty: 10 years
Ecotec + 620
- System Gas Boiler
- 20kW
- Band rating: A
- ERP rating: A
- Warranty: 10 years
Ecotec + 625
- System Gas Boiler
- 25kW
- Band rating: A
- ERP rating: A
- Warranty: 10 years
Ecotec + 630
- System Gas Boiler
- 30.4kW
- Band rating: A
- ERP rating: A
- Warranty: 10 years
Ecotec + 635
- System Gas Boiler
- 35kW
- Band rating: A
- ERP rating: A
- Warranty: 10 years
Ecotec + 826
- Combi Gas Boiler
- 26kW
- Band rating: A
- ERP rating: A
- Warranty: 10 years
Ecotec + 832
- Combi Gas Boiler
- 32kW
- Band rating: A
- ERP rating: A
- Warranty: 10 years
Ecotec + 836
- Combi Gas Boiler
- 36kW
- Band rating: A
- ERP rating: A
- Warranty: 10 years
Ecotec + 840
- Combi Gas Boiler
- 40kW
- Band rating: A
- ERP rating: A
- Warranty: 10 years
Ecotec + 940
- Combi Gas Boiler
- 40kW
- Band rating: A
- ERP rating: A
- Warranty: 10 years
Ecotec Plus 615
- System Gas Boiler
- 15.4kW
- Band rating: A
- ERP rating: A
- Warranty: 10 years
Ecotec Pro 24 Combi Boiler
- Combi Gas Boiler
- 24kW
- Band rating: A
- ERP rating: A
- Warranty: 10 years
Ecotec Pro 28 Combi Boiler
- Combi Gas Boiler
- 28kW
- Band rating: A
- ERP rating: A
- Warranty: 10 years
Other Boilers
Ecotec + 48KW
- System Gas Boiler
- 48kW
- Band rating: A
- ERP rating: A
Ecotec + 64KW
- System Gas Boiler
- 64kW
- Band rating: A
- ERP rating: A
Ecotec 46KW
- System Gas Boiler
- 46kW
- Band rating: A
- ERP rating: A
Ecotec 65KW
- System Gas Boiler
- 65kW
- Band rating: A
- ERP rating: A
Ecotec Exclusive Green Iq 627
- System Gas Boiler
- 26.7kW
- Band rating: A
- ERP rating: A
Home 12KW
- Regular Gas Boiler
- 12kW
- Band rating: B
- ERP rating: A
Home 12KW
- System Gas Boiler
- 12kW
- Band rating: B
- ERP rating: A
Home 15KW
- Regular Gas Boiler
- 15kW
- Band rating: B
- ERP rating: A
Home 15KW
- System Gas Boiler
- 15kW
- Band rating: B
- ERP rating: A
Home 18KW
- Regular Gas Boiler
- 18kW
- Band rating: B
- ERP rating: A
Home 18KW
- System Gas Boiler
- 18kW
- Band rating: B
- ERP rating: A
Home 25KW
- Regular Gas Boiler
- 25kW
- Band rating: B
- ERP rating: A
Home 25KW
- System Gas Boiler
- 25kW
- Band rating: A
- ERP rating: A
Home 30KW
- Regular Gas Boiler
- 30kW
- Band rating: A
- ERP rating: A