Boilers: Compare features & prices Vaillant ecoTEC plus 831 review
The Vaillant EcoTEC plus 831 condensing gas combination boilers benefit from Vaillant's 'Aquacomfort' system, designed to provide instantaneous hot water at a constant temperature. Read our full review to find out whether the Vaillant EcoTEC plus 831 is the right boiler for your home, and more importantly, whether Vaillant combi boilers benefit from good brand reliability.
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Overall energy efficiency
Boilers that have an efficiency of 88% or more and are therefore eligible for installation according to the Building Regulations Part L are awarded 5 stars for efficiency.
Brand reliability rating
Based on the results of our annual boiler reliability survey of Which? members. This applies only to boilers up to six years old, bought between 1 April 2005 and the end of May 2011.
