Vaillant ecoFIT sustain 618 18kw System Boiler Only 0010025272
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Vaillant ecoFIT Sustain 618 18kW System Boiler (0010025272) is a cost-effective, high-efficiency heating solution designed for medium-sized homes, new-build developments, landlords and large-scale housing projects. With an 18kW output and ErP A-rated efficiency, this system boiler provides reliable central heating and works with a separate unvented hot water cylinder to deliver dependable domestic hot water performance.
18kW
ErP A-Rated
Natural Gas
0010025272
The 18kW output provides dependable central heating for medium-sized homes and makes the boiler well suited to new-build housing projects and residential developments.
With a 1:4.5 modulation ratio, the boiler adjusts its heat output according to demand, helping improve efficiency and reduce unnecessary energy consumption.
Rear, horizontal and vertical flue configurations provide installation flexibility across different property layouts and development projects.
The ecoFIT Sustain range provides a straightforward, cost-effective and low-maintenance heating solution for builders, landlords, developers and housing associations.
Specifications
| Brand | Vaillant |
| Model | ecoFIT Sustain 618 |
| Product code | 0010025272 |
| EAN | 4024074850367 |
| Boiler type | System boiler |
| Output | 18kW |
| Fuel type | Natural Gas |
| Efficiency rating | ErP A-Rated |
| Modulation ratio | 1:4.5 |
| Hot water cylinder | Required – compatible with unvented cylinders |
| Installation | Wall-mounted |
| Flue options | Rear, horizontal and vertical |
| Noise level | Ultra-quiet operation |
| Flow temperature | Adjustable |
| Warranty | 2 years |
System boiler & installation
The Vaillant ecoFIT Sustain 618 is a sealed system boiler designed to work with a separate unvented hot water cylinder. It connects directly to the mains water supply and incorporates key system components to simplify installation. The wall-mounted design and flexible rear, horizontal and vertical flue options make it suitable for a variety of retrofit, new-build and housing development installations.
Warranty & next steps
The ecoFIT Sustain 618 is supplied with a 2-year warranty, making it a practical choice for builders, developers, landlords and housing associations seeking a straightforward heating solution. Before purchasing, check the required cylinder capacity, installation clearances, flue configuration, system requirements and current manufacturer specifications to ensure the boiler is suitable for the intended property.
