Vaillant ecoFIT Pure 615 Gas System Boiler

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Vaillant ecoFIT Pure 615 Gas System Boiler


Ultra-quiet operation, small footprint and total flexibility of siting (with top and rear flue options). Automatic purging assistance and high specification aluminium heat exchanger, makes for a lightweight installation. High quality and high efficiency, together with the complete availability of spare parts, mean the ecoFIT Pure is easy to maintain. Compatible with Vaillant intelligent controls, for a convenient and energy efficient system.
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product details

Vaillant ecoFIT Pure 615 Gas System Boiler

The Vaillant ecoTEC Plus 835 ErP Combi Boiler 0010021822 is a popular choice for medium-to-large sized properties with 3+ bedrooms and 1-2 bathrooms.

The Vaillant ecoTEC Plus 835 Combi Boiler is ErP compliant natural gas model and is a new addition to the Vaillant ecoTEC Plus range.

Combi Boilers are the ideal choice for properties where space is at a premium as central heating and hot water is supplied upon demand by heating the main water supply, so doesn't require the use of a hot water cylinder or cold water feed.

  • Central Heating Output: 31kW
  • DHW Flowrate: 14.3 litres per minute
  • Domestic Hot Water (DHW) output: 35kW

All Vaillant 835 Combi Boilers are in stock and available for immediate dispatch with a 5 year warranty as standard (extended warranties are available when installed by a Vaillant Advanced Installer).

key features

  • Modulating ratio of 1:6 offering greater efficiency
  • Low energy usage on stand-by mode
  • Stainless Steel Heat Exchanger
  • ErP Compliant due to low energy usage and high efficiency pump
  • A-rated efficiency
  • Typical installation time of 1-2 days (more should be allocated for systems that require radiator/pipe replacements)
  • Contemporary styled contoured case with improved control panel design

No flue is supplied as standard with the Vaillant EcoTec Plus 835 combi boiler. Please check the right side of the page for Vaillant flues and accessories or check our great Vaillant Boiler Packs.

warranty offer

As previously mentioned, the Vaillant ecoTEC Plus 835 Natural Gas ERP Combi Boiler 0010021822 range comes with a 5 year warranty as standard but Vaillant are currently offering 7 years if installed by a Vaillant Advanced Installer.

lead time
1-2 working days
boiler type
DHW Flowrate Range
DHW Flow Rate
fuel type
natural gas
Heating Output Range
30 - 35
Height (mm)
KW Output
Manufacturer Part No:
Output BTU/H
5 Years
Width (mm)

How can I work out what boiler I need?

To answer this question it deserves a little more attention than an FAQ section can provide. That's why we have created our Find a Boiler tool.

Just follow the easy to use steps and we will show you the options that best suit your needs.

What are the internal and external sizes of the BoilerBox

Inner - 76.8cm L x 57cm W x 41.5cm H - Outer - 80cm L x 60cm W x 44.5cm H

Are your products guaranteed?

Yes all our products come with a guarantee.
Guarantees or warranties vary, by product and manufacturer.

All our products are guaranteed for a minimum of 1 year (radiators 10 years, copper tube 25 years) but many offer longer warranties from the manufacturer, which you may need to register for.

On each product, under the specification tab, you will find more information on the guarantee or Warranty.

Follow links through to various manufacturers sites, as each manufacturer will have its own terms and conditions for qualifying for longer warranties.

You do not want to miss out by getting the wrong installer for some boilers etc.

As Boilers and radiators are installed by third parties, they do have to install in compliance with regulations and manufacturer standards to get the full benefit of the warranty.

As long as these ar fulfilled, you will get the maximum life and support from your new purchase.

What kilowatt rating do I need for an 8 radiator household for a combination boiler?

To calculate the size of boiler, you need to answer a few questions.

The easier method would be to use our Boiler finder tool.

Just follow the on screen prompts and this will filter down to the best choice of boilers for your needs.

About Us

We aim to deliver high quality service at a competitive price. Expert Vaillant Boiler Repairs, Servicing, Installation & Powerflushing. Our service motto is to offer an honest, reliable service to all our clients.