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vaillant boilers

At Vaillant, we offer different types of gas boilers to suit every living space. There are three main types of boilers available, combi, system and regular (sometimes called open-vent and conventional boilers).


To figure out the best one for you, you must consider the size of your home, how much heating and hot water you need, and your budget.


Combination boilers are suitable for smaller properties with both hot water and central heating needs, while system boilers are better for higher hot water demands and require a water cylinder. Regular boilers are best for homes with simultaneous hot water usage in multiple rooms, also requiring a cylinder for storage.


If you’re upgrading your system or want a like for like replacement, our boilers offer the highest quality, reliability and performance with guarantees of up to 10 years available.

What type of boiler are you looking for?

Combination Boilers

Compact sizes. Perfect for smaller properties

No need for a hot water cylinder allows increased living space

System Boilers

Ideal for homes with more than one bathroom

Constant supply of hot water to any number of taps at the same time

Conventional Open Vent Boilers

Perfect for homes where a lot of hot water is used at the same time

Ideal where there are two or more bathrooms