Selecting your Vaillant Boiler

The highest standards of design and precision engineering feature in all Vaillant products, ensuring dependable performance and reliability. This means that built-in efficiency comes as standard with your Vaillant boiler, bringing fuel savings and low running costs. A benefit not only to your pocket, but for the environment too.

Vaillant offers a comprehensive range of combination and system boilers and now open vent boilers too, so it’s easy to find the right one for you.

Whatever your requirements, Vaillant has a boiler designed to suit you. You may be unsure about which type of boiler is most suitable for your home and your requirements. This boiler selection wizard is designed to make your choice easier. We also recommend you speak to a CORGI registered Vaillant installer, who is trained and qualified to give you the advice you need.

To help you make the right boiler selection, use the table below to identify the correct choice for your requirements.

Boiler Selector		Number of Showers
Boiler Selector		1	2 or More
Number of Baths	1	TURBOmax Plus or ecoMAX 800	ecoMAX pro or ecoMAX 600 or THERMOcompact with VANTAGE
Number of Baths	2 or More	ecoMAX pro or ecoMAX 600 or THERMOcompact with VANTAGE	ecoMAX pro or ecoMAX 600 or THERMOcompact with VANTAGE

A rough guide to system types

Combination boilers

Combination boilers supply both central heating and domestic hot water directly from the boiler, so there is no need for a hot water cylinder or cold water tank. This makes them the perfect choice where there is no loft or where space is at a premium. Instantaneous hot water is available on demand and you can have a high performance shower too.

System boilers

System boilers are designed for use with a hot water cylinder and provide both central heating and domestic hot water in larger homes, or homes with more than one bathroom. With all major components built-in, system boilers have been designed for greater reliability as well as quicker, neater and easier installation.

System boilers can be installed with any conventional hot water cylinder or with an unvented cylinder, which gives the benefit of mains pressure hot water.

Condensing boilers

Condensing boilers are fitted with a high performance heat exchanger which recaptures otherwise wasted heat. The result of this is even better performance, greater energy efficiency and lower running costs and emissions. Condensing technology is available in both combination and system boilers for all domestic applications.


Unvented Cylinder Systems	Unvented hot water cylinders ensure optimum performance with hot water supplied at mains pressure, without the need for a cold water tank or pipework in your loft. For use with a system boiler.