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Vaillant ecoTEC plus 637 review

£1,281.00 Typical price

Brand score %

Key features
  • Gas
  • System

The Vaillant EcoTEC plus 637 is the most powerful system boiler version in the range. It is a condensing gas boiler that uses a separate cylinder (usually fitted into an airing cupboard) to store the hot water supply. Often called 'sealed system boilers' Vaillant claims they are lightweight and easy to install, as there's no need for a water tank in the loft. Read our full review to find out whether the EcoTEC plus 637 is the right boiler for your home, and more importantly, whether Vaillant boilers benefit from good brand reliability.

Included in our expert review
  • Pros and cons
  • Heating engineer views
  • What type of home is this boiler suitable for?
  • Will this boiler produce enough hot water for my home?
  • How efficient is this boiler?
  • What controls does this boiler have?
  • Is this boiler smart compatible?
  • What is the warranty with this boiler?
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Technical specifications

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Specification

Brand scores

The overall Which? test score is made up of the following star ratings, all determined by our rigorous lab tests.

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