Boiler brands rated Vaillant
German brand Vaillant has been in the heating market for more than 135 years, and now sells products in more than 80 countries.
Vaillant high efficiency boilers
Vaillant offers four types of combination boilers that supply heat and instant hot water. The range starts with the basic EcoTec Pro which is suitable for smaller homes. The EcoTec Plus range comes in three power levels – the more hot water taps you have the higher power you will need.
The EcoTec Plus 937 combi storage boiler can store 15 litres of hot water to reduce the time it takes to deliver piping hot water to your taps. The top-of-the range EcoTec Exclusive is suitable for larger properties and has a three-year warranty.
Vaillant also offers an EcoTec Plus open-vent boiler – the type for homes that have the traditional plumbing arrangement of a cold water supply tank and hot water storage cylinder. This is available in four heat outputs to cater for small, medium and larger homes.
The EcoTec Plus system boiler provides an even wider range of outputs (12-37kW) for homes that use a hot water cylinder but have a system boiler.
To find out more details on the features, pros and cons of each of these Vaillant boilers visit the Which? boiler reviews.
Vaillant boilers – The Which? verdict
Vaillant is the second most popular gas boiler brand with Which? members.
|Brand data for Vaillant gas condensing boilers|
|Which? Survey results||Score|
|Which? Customer Score|
|Ownership among Which? members with gas boilers|
|Most common faults experienced by owners|
|Water leaking from the boiler|
|Boiler noisy in operation|
|Boiler keeps switching itself off|
|Control panel displays and error code and cannot be reset|
|Problem with built-in controls|
|Boiler completely broke down|
|Water leaking from condensate pipe|
Table notesAverage customer score is 74% and average reliability score is 74%, based on responses from 5,115 Which? connect panel members. Scores are based on boilers bought since April 2005. Brand reliability sample size (779). Customer score sample size (903). The most common faults requiring repair of Vaillant boilers installed since April 2005; sample size (905).
Vaillant warranty and servicing
Vaillant boilers are typically supplied with a two-year parts and labour warranty. You must get the boiler serviced after the first 12 months to qualify for the second year of warranty.
The guarantee card should be registered within 30 days of the boiler being installed.
Vaillant claims to have a team of 200 Gas Safe registered engineers trained to repair and service Vaillant boilers.
Vaillant service enquiries
01773 596 660
Vaillant repairs and spares
Vaillant's own team of engineers carry spare parts with them.
Vaillant also offers two options for boiler breakdown cover which include and annual service.
Vaillant breakdown cover
0800 032 4597
Vaillant contact details
You can contact Vaillant by letter at:
Vaillant House, Trident Close,
Medway City Estate
Kent ME2 4EZ
or through its website www.vaillant.co.uk.
Vaillant general enquiries
01634 292 300
Vaillant technical enquiries
0906 802 0251
For top tips on choosing a new boiler see our guide how to buy the best boiler.