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

When buying a new boiler, you want to speak to someone you can trust, that will support your needs now and in the future.

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What customers say about Clever Energy Boilers

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

Did an absolutely amazing job when we needed our boiler replacing. Not only were the cheapest, but also provided a quote within a day, came up with the most practical and best solution, started and completed the job in 2 days precisely as planned, left the place spotless, re-lagged all the pipes neatly, and then removed all the old kit and disposed of it. Really, really impressed, can’t recommend highly enough.

Ms Marie Moor, Driffield, Yorkshire

When we realised our boiler was on its last legs, we got a few quotes to get it replaced. Clever Energy Boilers were not the cheapest but we liked there fact we could pick up the phone and speak to someone, plus they got back to us when we had a query quickly.

Mr Denis Towers, Preston, Lancashire

We were desperate for a whole new boiler and heating system and the prices were terrible then my fella found Clever Energy Boilers so I gave them a ring and booked in for a quote…

Ms Kirsty Higgins, Halifax, Yorkshire

We had previously used Clever Energy Boilers as a family and they had come to us highly recommended. Richard  found a leak as part of tidying up which could have caused significant problems down the line. He found and repaired the problem along with fitting new radiators throughout the property. The job, service and quality was superb. We found them personable but most important all the work which was completed was done to such high quality. It wasn’t an easy job for them but they have further enhanced their reputation with what they carried out. I would therefore have no hesitation in recommending them to other family and friends and we are overall thankful to them for their work.

Ms Christine Kay, West Yorkshire