Key Information
- 25kW Output — Ideal for small to medium-sized homes
- Gas Combi Boiler — Provides heating and instant hot water from one compact unit
- Compact Cupboard-Fit Design — Small footprint for flexible installation
- Top and Rear Flue Options — Allows greater siting flexibility
- Compatible with Vaillant Controls — Supports smart heating management
- Warm Start Function — Helps deliver hot water more quickly
- Clear LED Display — Easy-to-read diagnostic and system information
- Front Access Design — Simplifies installation and servicing
- Patented Four-Sided Cooling System — Reduces stress on internal components
- 2-Year Manufacturer Guarantee — Peace of mind from Vaillant
What's Included
The Vaillant ecoFIT Sustain 825 25kW Gas Combi Boiler is a compact and efficient heating solution designed to deliver reliable heating and instant hot water for modern homes. Combining strong performance with a small footprint, it offers an excellent size-to-output ratio, making it ideal for installations where space is limited.
Built with Vaillant’s trusted engineering and high-quality components, the ecoFIT Sustain range provides dependable performance while remaining easy to install, maintain and operate. Its cupboard-fit design and flexible flue options make it a practical choice for a wide variety of properties.
Compact Yet Powerful Performance
With a 25kW output, the ecoFIT Sustain 825 provides reliable heating and hot water performance while maintaining compact dimensions. The boiler is designed to fit neatly inside standard kitchen cupboards, giving installers greater flexibility when choosing installation locations.
Despite its compact size, the boiler delivers strong efficiency, achieving up to 89.3% efficiency (SAP 2009), helping households reduce energy usage and keep running costs under control.
Flexible Installation Options
The ecoFIT Sustain 825 is designed to offer maximum siting flexibility. Top and rear flue options allow installers to position the boiler in a range of locations throughout the home.
The boiler supports flue lengths of up to 10m using a 60/100 flue system or up to 25m with an 80/125 flue, making it suitable for installations where longer flue runs are required.
Its lightweight construction and compact footprint also help simplify installation, particularly in confined spaces.
Smart Controls and Efficient Operation
The ecoFIT Sustain 825 is fully compatible with Vaillant’s intelligent range of heating controls, helping homeowners manage their heating system more efficiently. When paired with compatible controls, users can optimise heating schedules and improve energy efficiency.
A warm start function also helps provide hot water more quickly at the tap, improving everyday comfort.
Built for Long-Term Reliability
Vaillant has designed the ecoFIT Sustain range with durability and reliability in mind. These gas boilers feature a high-specification aluminium heat exchanger, which is engineered to provide efficient heat transfer while remaining easy to maintain.
The system also incorporates patented four-sided cooling technology, which helps reduce stress on internal components and can contribute to lower maintenance costs over the life of the boiler.
A clear LED display makes the boiler simple to operate and provides easy visibility of diagnostic information, even in dimly lit installation areas.
Order from PlumbNation Today
Choose the Vaillant ecoFIT Sustain 825 25kW Gas Combi Boiler for compact, efficient heating and reliable hot water performance. Order today from PlumbNation for competitive pricing, expert advice and fast UK delivery.
