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Vaillant ecoFIT sustain 618 18kw System Boiler Only 0010025272

SKU V-0010025272
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Original price £1,113.72
Original price £1,113.72 - Original price £1,113.72
Original price £1,113.72
Current price £894.99
£894.99 - £894.99
Current price £894.99

The Vaillant ecoFIT Sustain 618 System Boiler (0010025272) is a cost-effective, high-efficiency heating solution designed specifically for builders, developers, and large-scale housing projects. With an 18kW output, this A-rated system boiler is perfect for medium-sized homes requiring reliable central heating and hot water when paired with an unvented cylinder.

Designed for ease of installation and low maintenance, the ecoFIT Sustain 618 offers a 1:4.5 modulation ratio, optimizing efficiency by adjusting its output to match demand, reducing energy waste, and lowering running costs. This boiler also features flexible flue options, including rear, horizontal, and vertical configurations, making it adaptable to various property layouts.

Unlike other Vaillant models, the ecoFIT Sustain range is aimed at the construction sector, providing a straightforward, robust heating solution with a standard 2-year warranty—ideal for landlords, new-build developers, and housing associations.


What is a System Boiler?

A system boiler connects directly to the mains water supply and works with an unvented hot water cylinder to store and distribute hot water efficiently. Unlike combi boilers, system boilers allow multiple taps and showers to run simultaneously without pressure loss. Featuring an integrated pump and expansion vessel, system boilers provide fast heating response times and simplified installation for larger homes and multi-bathroom properties.


Product Specifications

For full data sheet click here.

Feature Details
Product Code 0010025272
EAN (Barcode) 4024074850367
Brand Vaillant
Type System Boiler
Output 18kW
Fuel Type Natural Gas
Efficiency Rating ErP A-Rated (High Efficiency)
Modulation Ratio 1:4.5 for optimized performance
Hot Water Cylinder Required Yes (System Boiler)
Noise Level Ultra-quiet operation
Flow Temperature Range Adjustable for precise heating control
Installation Wall-mounted, suitable for retrofit or new installs
Flue Options Rear, horizontal, and vertical flue options
Warranty 2 years

Why Choose the Vaillant ecoFIT Sustain 618?

Reliable 18kW Output – Ideal for medium-sized homes in new-build projects.
Built for Housing Developments & LandlordsLow-maintenance, cost-effective heating.
Flexible Flue Installation – Supports rear, horizontal, and vertical flue options.
A-Rated Energy EfficiencyReduces running costs while maintaining performance.
Compact & Quiet Operation – Designed for space-saving installation in various property types.
2-Year Warranty – Specifically designed for builders, developers, and housing associations.

The Vaillant ecoFIT Sustain 618 System Boiler is the ideal choice for new-build housing developments, rental properties, and large-scale construction projects.

Get the best price on the Vaillant ecoFIT Sustain 618 from Getplumb – Reading’s trusted plumbing and heating supplier. Order online for fast delivery or collect in-store today!

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