ecoTEC Plus 415, 418, 428, 438

The ecoTEC plus range of high efficiency open vent boilers offers fantastic efficiency levels and high performance, with great usability.

For homes which already use a traditional open vented system (with a storage cylinder and cold water tank), this extremely compact, highly versatile and kitchen friendly boiler makes the perfect upgrade.

Using premium components and displaying all the in-built quality you’d expect from Vaillant, the ecoTEC plus open vent boiler offers exceptional reliability and performance, making it one of the best models available today within this category.

The range is available in 15kW, 18kW, 28kW, and 38kW models meaning there is a suitable model for almost any home. The stylish design and small dimensions also make it a perfect fit with your home and your lifestyle.

What’s more, with a Quiet Mark award you can be assured knowing the ecoTEC plus is one of quietest boilers on the market!



*Installation costs, carbon savings and gas bill savings are all based on replacing an older G rated appliance in a typical 3 bedroomed mid 20thcentury house with an ecoTEC pro combination boiler and a time switch 150 and VRT 50 basic room thermostat control system using SAP standard calculations. Costs shown for upgrading this system are based on typical equipment and installation costs, and are shown for illustration purposes only. To obtain an accurate quote for installing this system, in your home, please seek the advice of a Gas Safe registered installer.

ecoTEC plus1

The ecoTEC open vent boiler has many welcoming benefits and demonstrates innovative heating technology such as:


  • For the best results and most cost effective system, your installer should carry out a full heat loss calculation. By doing taking into consideration the age and size of your property, the installer will be able to determine which model is best suited for your home.
  • The installation of a Vaillant ecoTEC open vent boiler typically takes between 1-2 days, however some time should be allocated for systems where radiators and pipe work need replacing.
  • With an ecoTEC open vent boiler you will receive a 5 year guarantee as standard or a 7 year guarantee if you choose to have a Vaillant Advance installer perform the work.
  • Awarded Quiet Mark approval.
  • Highly efficient and economical to run with up to an 89.2% efficiency rating (SAP 2009)
  • Push button programming makes usage straightforward and easy to fit with you lifestyle.
  • Built in 2 stage frost protection to ensure optimal performance all year round.
  • Compatible with LPG for off gas areas (418-438 models)
  • Demonstrates exceptional flexibility and design innovation due to its compact dimensions and kitchen friendly design.

Replacing a boiler system can be costly; however with Vaillant’s new innovative heating technologies you could potentially make savings on your gas bill and reduce your carbon footprint.auroTHERM-plus2

  • Depending on your system requirements, a boiler replacement installation of this kind typically costs between £2000-£3000*
  • When installing this type of system along with weather compensating controls and an outdoor sensor, you could save up to approximately £225 on your gas bill per year*
  • By upgrading an old standard gas boiler to this efficient system (with weather compensating controls and an outdoor sensor) you could save up to approximately 1,265kg of Co2/year*