Key Information
- 18kW Output — Suitable for homes using a system boiler with a hot water cylinder
- Gas System Boiler — Designed to work with separate hot water storage
- Compact Cupboard-Fit Design — Flexible installation in kitchens or utility areas
- Aluminium Heat Exchanger — Lightweight, durable and efficient
- Top and Rear Flue Options — Flexible siting in a wide range of properties
- Low NOx Modulating Burner — Improved efficiency and reduced emissions
- Grundfos High-Efficiency Pump — Helps reduce energy consumption
- Patented Four-Sided Cooling System — Reduces stress on internal components
- Vaillant Diagnostic Display — Quick and easy system monitoring
- 2-Year Manufacturer Guarantee — Peace of mind
What's Included
- 1 x Vaillant ecoFIT Sustain 618 Gas System Boiler
The Vaillant ecoFIT Sustain 618 Gas System Boiler is a compact and efficient heating solution designed to provide dependable performance while maintaining a small installation footprint. Part of the ecoFIT Sustain range, it offers an excellent size-to-output ratio, making it ideal for homes where space is limited but reliable heating is essential.
Designed specifically for the specification market, this system boiler combines flexible installation options with durable components and energy-efficient operation. Its cupboard-fit design and lightweight construction make it particularly suitable for modern housing developments and refurbishment projects.
Compact Heating with Strong Performance
With an 18kW output, the ecoFIT Sustain 618 is designed to deliver reliable heating performance when used with a separate hot water cylinder. The compact boiler dimensions of 702mm x 390mm x 295mm allow it to fit neatly inside standard kitchen cupboards or utility spaces.
At the core of the gas boilers are a high-quality aluminium heat exchanger, which provides efficient heat transfer while remaining lightweight and durable. This design also helps simplify installation and maintenance.
The system delivers up to 89.3% efficiency (SAP 2009), helping households reduce energy consumption and maintain lower running costs.
Flexible Installation Options
The ecoFIT Sustain 618 offers flexible siting thanks to top and rear flue options, allowing installers to position the boiler in a wide range of locations within the home.
Its compact cupboard-fit design and low lift weight help make installation easier, particularly in confined spaces or when replacing older boilers.
The boiler is also compatible with Vaillant’s full range of flue systems and heating controls, providing greater flexibility when designing efficient heating systems.
Efficient and Intelligent Operation
The ecoFIT Sustain 618 incorporates advanced components designed to improve system efficiency. A fully modulating low NOx burner and fan help optimise combustion while reducing emissions.
The boiler also features a high-efficiency Grundfos pump, which automatically adjusts its performance to match system demand, helping to reduce energy consumption.
A patented condensate trap with safety backup simplifies installation and maintenance while providing additional system protection.
Built for Long-Term Reliability
Vaillant has designed the ecoFIT Sustain range to deliver dependable long-term performance. The patented four-sided cooling system helps reduce stress on internal components, which can help minimise maintenance costs over the lifetime of the boiler.
A clear Vaillant diagnostic display provides easy-to-read system information, allowing engineers to quickly identify any faults and carry out maintenance more efficiently.
Order from PlumbNation Today
Choose the Vaillant ecoFIT Sustain 618 Gas System Boiler for compact, efficient heating performance and dependable Vaillant reliability. Order today from PlumbNation for competitive pricing, expert advice and fast UK delivery.
