Vaillant ecoTEC Sustain 24kW Combi Boiler
The Vaillant ecoTEC Sustain 24kW Combi Boiler gives you reliable heating and hot water in a small, quick-to-fit design. It is manufactured to meet the needs of installers, local authorities and heating engineers, the ecoTEC Sustain brings together simplified servicing and Vaillant's engineering reliability.
Features and Benefits: ecoTEC Sustain 24kW Combi Boiler
British Manufacturing: Built by hand and factory tested by Vaillant at its Belper manufacturing plant in Derbyshire, UK.
Stainless Steel Heat Exchanger: With its high thermal conductivity and excellent corrosion resistance for prolonged durability.
Installer & Service-Friendly Design: Front-access to components, removable side panels and push-fit flue system make maintenance hassle-free.
Dimensions: Its small footprint of 720 x 440 x 338mm makes retrofitting into existing ecoTEC pro boiler locations a cinch.
Efficient Heating: Providing outputs of up to 20.1kW at 50/30°C in condensing mode and has a 92% ErP ' A' efficient rating.
1:3.8 Modulation Ratio: Automatically reduces the output to match milder weather helping save money on fuel bills and prevent short cycling during operation.
Hot Water on Demand: With a peak output of 24.3kW to give 9.9 litres per minute at a 35K temperature rise without the need for a hot water cylinder.
49 dBA Quiet Mark Certified: Operates at a low sound power level.
Low-NOx Performance: With a modulating low-NOx burner, modulating fan and high efficiency Grundfos pump means this boiler can achieve NOx Class 5 rating.
Interface: High-contrast blue-on-black illuminated LED display that features simple controls with Vaillant diagnostic fault codes.
Condensate Safety: Base-removable condensate trap with integral safety siphon helps protect the system from freezing in winter.
Smart and Hybrid Ready: Native eBUS connectivity supports Vaillant vSMART weather-compensating controls and can be integrated into aroTHERM heat pump hybrid systems.
Technical Insight
If you are swapping out an older ecoTEC pro for the ecoTEC Sustain 24kW, then it is useful to know that the units share the same 720 x 440 x 338mm dimensions. This means you can use your existing jig setups for easy swapping over to the new boiler. You should flush the system with a cleaner that is benchmark-compliant before you turn anything on as this will help protect the stainless steel heat exchanger from early corrosion or scale.
Connecting the boiler through Vaillant's 2-wire eBUS protocol (instead of the usual 230V switched live) allows the boiler to constantly fine-tune its flame size according to the outdoor weather. This gives lower return water temperatures, keeping the system in its high-efficiency condensing mode for extended periods.
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