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ecoTEC plus 826, 832, 836, 840, 940

Combination boiler

  • Smart home ready for precise control and energy optimisation
  • Features new IoniDETECT technology - intelligent gas combustion monitoring for even greater system efficiency
  • Hydrogen prepared* - a potential home heating solution for years to come
  • Hand-built in our award-winning Derbyshire manufacturing plant


*the new ecoTEC plus is our first product range, incorporating new technology, which has been independently certified to operate with up to 20% hydrogen and other blended gas mixtures, preparing the product should the UK Government decide that these fuels have a role to play in our future energy mix.

General Information

The new ecoTEC plus is the product of hours of research and development, years of expertise and innovation and a series of fine, precise improvements that have sharpened, intensified and enhanced performance specifically for the UK market. We’ve started with a classic, and taken it to the next level.

The new ecoTEC plus takes connectivity to a whole new level. Paired with our new plug-and-play internet gateway, myVAILLANT connect, it enables app control, smart home integration and remote appliance care and support in minutes, for increased efficiency and first-class customer service.



~ Can be reduced to 5mm if fitted behind removable door / panel

** Vaillant combi boilers are fitted with a flow regulator set to achieve a temperature rise of 42°C. This maintains comfortable bathing and showering during the colder months of the year.

Related Products

Related Products

myVAILLANT connect

  • Smart phone app for both Android and Apple
  • Smart home compatible*
  • Connect to boiler, heat pump or hybrid systems


  • Weather compensating
  • Intuitive interface
  • Energy dashboard

sensoHOME / sensoHOME RF room thermostat

  • Time programme assistant
  • Load compensation
  • Weather compensation**


  • Enhanced load and weather compensation
  • eBUS technology
  • Service and maintenance updates

Domestic boiler cylinders

  • Slim line, pre plumbed and standard cylinders in the range
  • 2 year guarantee on parts and labour plus 25 year guarantee for the cylinder shell, giving you total peace of mind.
  • Can be retrofitted onto older systems meaning you can upgrade your cylinder without the hassle of the entire system.