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A white Vaillant ecoTEC sustain 28kW combi gas boiler is shown on a green to yellow gradient background with text: "Fully Fitted," "£0 Deposit," and "Vaillant ecoTEC sustain 28kW Combi Gas Boiler.

Vaillant ecoTEC sustain 28kW Combi Gas Boiler

£2,899.00

Efficient combi for medium homes, with low maintenance and green credentials.

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Solar Panels & Boiler Installations Nationwide

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The Vaillant ecoTEC sustain 28kW Combi Gas Boiler is a condensing combi boiler for medium-sized homes with up to 12 radiators and 1-2 bathrooms, tailored for social housing specifications. It delivers a hot water flow rate of 11.5 litres per minute at 35°C and a 94% seasonal efficiency rating (ErP A-rated). Measuring 720x440x338mm and weighing 36kg, it’s cupboard-friendly and matches the ecoTEC pro footprint for quick replacements. It features a stainless steel heat exchanger with front access, a low NOx burner and fan, and a Grundfos high-efficiency pump. Quiet Mark certified, it includes a removable condensate trap, push-fit flue system, and a large blue-on-black LED display for easy fault identification. Compatible with aroTHERM hybrid systems and vSMART controls, it’s tested for 20% hydrogen blends, supports natural gas or LPG, and offers a 2-year warranty, extendable with a Vaillant Advance installer. Perfect for medium homes prioritizing low running costs and sustainability.

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