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A white Vaillant ecoTEC sustain 24kW combi gas boiler on a green-yellow gradient background, with text: "Fully Fitted," "£0 Deposit," and "Vaillant ecoTEC sustain 24kW Combi Gas Boiler.

Vaillant ecoTEC sustain 24kW Combi Gas Boiler

£1,950.00

Compact, specification-focused combi for small homes, with high efficiency and quiet operation.

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Solar Panels & Boiler Installations Nationwide

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The Vaillant ecoTEC sustain 24kW Combi Gas Boiler is a condensing combi boiler designed for small homes or flats with up to 10 radiators and 1 bathroom, particularly suited for social housing. It offers a hot water flow rate of 9.9 litres per minute at 35°C and a 94% seasonal efficiency rating (ErP A-rated). Measuring 720x440x338mm and weighing 36kg, it fits in a standard kitchen cupboard, with the same footprint as the ecoTEC pro for easy replacements. Features include a high-quality stainless steel heat exchanger with front access for easy maintenance, a modulating low NOx burner and fan for reduced emissions, and a Grundfos high-efficiency modulating pump to lower energy use. Quiet Mark certified, it includes a new condensate trap with safety backup, removable side panels, and a push-fit flue system (60/100mm or 80/125mm) for flexible installation. It’s compatible with the aroTHERM air-to-water heat pump hybrid system and Vaillant’s vSMART app-based control with weather compensation. Tested for 20% hydrogen blends via the HyDeploy project, it supports natural gas or LPG with a conversion kit and comes with a 2-year parts and labour warranty, extendable with a Vaillant Advance installer. Ideal for cost-effective, eco-friendly heating in small properties.

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