Vaillant Boilers offer outstanding German Technology and have an excellent reputation throughout the UK. Reliability and quality in both product and service are at the heart of Vaillant.

Vaillant ecoTEC Plus 835 35Kw combi boiler

The Vaillant ecoTEC Plus 835 35Kw is a boiler that does not require a hot water storage tank or a cold water feeder tank in the loft. It’s built for the home that doesn’t have a lot of extra room to store water, and will deliver instant hot water on demand. Available in outputs between 25kW and 38kW, this particular model is available to run on mains gas but there are models that are available for LPG if required.

The Vaillant ecoTEC Plus 835 35Kw is a combi style boiler that delivers hot water almost instantaneously. It’s recognised in Which? magazine for being very dependable and not breaking down often, which will save you money over time.

The Vaillant ecoTec Plus 835 delivers 89.3% when it comes to heating efficiency, which is typical for this type of boiler. The controls are exposed and very easy to use.

You’ll find an on/off switch for controlling your water and central heating. You will need to fit extra controls such as a thermostatic radiator valves and a room thermostat to get the best from this model. Your engineer or heating installer can recommend which ones are the most suited to your home .

Central heating output: 31kW
DHW flow rate: 14.3 litres per minute
Domestic hot water (DHW) output: 35kW

  • German technology
  • Compact combi boiler
  • A rated – highest possible efficiency rating
  • Lightweight can mount onto the wall
  • Easy to service
  • Removable side panels for greater access
  • High performance, control and efficiency
  • Precision heating to reduce your fuel bills
  • Delivers hot water within 5 seconds
  • No need for a storage tank or cylinder
  • 5 year guarantee – with 7 to 10 year available
  • Smart thermostats can be added

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What customers say about Clever Energy Boilers

My wife and I would like to thank you all for the competence and excellent work carried out at our home, from the estimate and the fitter who plumbed in the new boiler, to the electrician who made our programmer work with the boiler, an excellent team of manpower seldom seen with so called professionals.

Mr & Mrs Sheen, Doncaster

Thanks Tom for all your patience and time you spent answering all my questions and promptly ringing me back each time and thanks to your office staff always polite and helpful, a big thank you to John and Chris for installing the boiler and all the other jobs, both worked efficiently and cleanly, John was very good explaining everything as he went along. 

Mr Peacock, Holmfirth

I am very happy with the service I received. My new boiler has been installed very quickly and hassle free, I would definitely recommend this service.

Moyra Thomas, Stockport

Rizwan was a very good engineer he was very clean and made the place spotless after he had gone.

Mary Jones, Birmingham

Brilliant service from all the team. Thanks. Our old boiler died and from a very reasonable quote to fitting a new one within a couple days. Excellent advice and workmanship too.

Adrian Charlton, West Yorkshire

My old boiler went kaput, Clever Energy Boilers gave me a great price and fitted my new boiler within 3 days. Very pleased with the work carried out and would not hesitate to recommend to anyone needing a new boiler. A big thank you to both the installation team and the electrical man, both first class.

Mr Herbert, Yorkshire