ecoTEC plus combination boiler

25, 32, 35 and 38kW outputs

  • Which? best buy and Quiet Mark awarded
  • Easy to use and stylish design
  • LPG models available for off gas areas
  • ErP rated A
  • 7 year warranty available with options up to 10 years when registered by an Advance installer


Requiring no hot water cylinder or cold water tank in the loft, this combination boiler provides almost instant hot water delivery to your taps and fits simply and easily into homes even with limited space.

The ecoTEC plus high efficiency combi boiler range uses premium components for outstanding performance, quality, reliability and efficiency, the very best in home heating. The ecoTEC combination range is available in a wide range of outputs from 25kW to 38kW.

Features & Benefits

  • The 825 model is more suitable for a 3 or 4 bedroom flat with 1 bathroom, or a small house with a low hot water requirement.
  • The 832 and 838 models are more appropriate for 3 or 4 bedroom properties, with 1 or 2 bathrooms.
  • Highly efficient and economical to run with up to an 89.4% efficiency rating (SAP 2009)
  • Hot water delivery within 5 seconds, without the need for a storage tank or cylinder.*
  • Dedicated models available for LPG for off gas areas.
  • Stylish contoured case design with drop down flap making this a boiler which fits with the decor of any home.
  • Standard 2 year warranty, can be upgraded to a 7 year warranty when registered by aVaillant Advance installer
  • Option to purchase extended warranty up to 10 years when registered by an Advance installer



Unit ecoTEC plus 825 ecoTEC plus 832ecoTEC plus 835 ecoTEC plus 838
SEDBUK SAP seasonal efficiency 2009%89.389.389.389.3
ErP rating for Central Heating AAAA

ErP rating for Hot Water



Boiler dimension (WxHxD)mm440x720x338440x720x338440x720x372440x720x406
Minimum central heating outputkW 45.5
6.4 (LPG)
Maximum flow temperature°C85858585
Minimum DHW flow ratel/min2222

Related Products

Related Products

vSMART™ intelligent room control with app

Heating and hot water control at your fingertips

  • Smart phone app for both Android and Apple iOS application
  • Self learning
  • Weather compensation
  • Connect multiple vSMART controllers to one app
  • Wireless connection

5,8,11 and 15kW

  • Unique triVAI intelligent control system
  • Excellent green credentials
  • Compatible with all boiler systems - gas, oil and LPG
  • Easy to install and commission
  • Provides significant carbon and energy bill savings


How to get

How to Buy?

It’s fair to say that some of the terminology around boilers and central heating systems can be complex and sometimes confusing, which is why we always advise contacting a qualified heating engineer who can advise on the best heating system for you and your requirements.

But finding a Vaillant installer couldn’t be simpler, and like us they’ll be with every step of the way.

Click here to search for your local installer.

Once you have contacted your chosen installer(s), they will arrange an appointment to visit your home, understand your requirements and give you a quote for the installation, product, controls and any power flushing or chemical treatments.

Why choose a Vaillant Advance installer?

Advance is Vaillant’s installer loyalty scheme. By choosing a Vaillant Advance Partner, you’re choosing our network of fully trained, independent installers who can offer you exclusive extended Guarantees, as well as a free no obligation quote to ensure your Vaillant boiler is the perfect fit for you and your home.