How Much Does a Vaillant Boiler Cost? UK

Last updated: November 15, 2023

Vaillant boilers is the second-largest boiler manufacturer in Europe and one of the largest companies in the heating industry, renowned for their German engineering and excellent reputation among both customers and gas engineers. 

Compared to other boiler manufacturers Vaillant have also tended to avoid making deals with online boiler installers and favoured their own network of Vaillant advanced Gas Safe installers.

In addition to gas boilers, the boiler manufacturer also offers a comprehensive range of heating and cooling appliances, including combi boilers, system and regular boilers, as well as heat pumps. 

Vaillant Combi Boiler Prices UK

Vaillant ecoFIT Pure Combi25 – 35kWSmall, medium and large-sized homes with one bathroom£850 – £1,100
Vaillant ecoTEC Pro Combi24 – 30kWSmall, medium and large-sized homes with one bathroom£900 – £1,800
Vaillant ecoTEC Plus Combi25 – 38kWSmall, medium and large-sized homes with one bathroom£1,100 – £1,500
Vaillant ecoTEC Exclusive with Green iQ Combi35 – 43kWMedium to large homes with one or two bathrooms£1,400 – £1,920

By buying a new gas boiler from the Vaillant boiler brand, you can be confident knowing that your boiler has been designed and manufactured in Germany.

See local Energy Guide approved installers we recommend for your job:

All modern Vaillant gas boilers also use condensing technology and are A-rated, this means that they are at least 90% efficient, helping you to save even more on your heating bills.

Vaillant System Boiler Price Range

System boilers are pressurized insulated systems. A filling mechanism draws cold water straight from the mains supply,  this eliminates the need for cold water storage.

Vaillant system boilers can also be used in conjunction with other renewable energy heating systems such as solar thermal. Prices range from £780 to £2,800 with varying outputs to suit any home.

Designed for homes with greater domestic hot water (DHW) demands, the Vaillant system boiler range includes the following options:

Vaillant ecoTEC Plus System12 – 37kWSmall, medium and large-sized homes with multiple bathrooms£780 – £1,370
Vaillant ecoFIT Pure System12 – 30kWSmall, medium and large-sized homes with multiple bathrooms£840 – £1,160
Vaillant ecoTEC Exclusive with Green iQ System27kWMedium to large-sized homes with multiple bathrooms£1,300
Vaillant ecoTEC Plus 48kW & 64kW System48 – 64kWLarge homes with multiple bathrooms£2,200 – £2,600
Vaillant ecoTEC 46kW & 65kW System46 -65kWCommercial buildings and large homes with multiple bathrooms£2,200 – £2,800

Vaillant Regular Boilers Price Range – Ideal for Larger Properties

The boiler, cold water tank, and hot water storage cylinder are all present in a traditional boiler.

The boiler may offer both hot water and heating water since it feeds hot water to both the central heating system and the storage cylinder.

A cold-water tank, which is usually positioned in higher areas of the house, such as the attic or loft, provides cold water to the boiler. Gravity aids in the filling of the boiler.

The boiler will provide hot water to the hot-water cylinder or the radiators once it has started.

Vaillant regular boilers start at £796 to £1430 and are offered in varying power outputs (shown in kilowatts or kW).

The Vaillant regular boiler range has been developed with small, medium and large homes in mind, and includes:

Vaillant ecoFIT Pure Regular12 – 35kWSmall, medium and large-sized homes with more than one bathroom£730 – £1,440
Vaillant ecoTEC Plus Regular12 – 35kWSmall, medium and large-sized homes with more than one bathroom£720 – £1,520

Vaillant Boiler Prices FAQ

So why else should you consider Vaillant as your choice for home heating?

Vaillant Boiler Customer Reviews & Aftercare

When buying a new boiler for your home one of the most important considerations is how the boiler company will treat you after the installation.

What if something goes wrong or your boiler develops a fault? Will they be there to help you get it back up and running asap?

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Thankfully, over 6,000 Vaillant customers can be read on the world’s most popular customer review platform, Trustpilot.

The boiler brand has an overall score of 4 out of 5 stars on Trustpilot, with 76% of customers leaving a 5-star review and rating Vaillant boilers as excellent.

That’s a pretty good score for boiler brands and even better than the UK’s biggest boiler seller!

Wondering how much a new boiler costs? Check out our guide on options available if you need a new boiler but can’t afford it, as well as boilers on finance and government boiler grants here.

Vaillant Which Best Buy Score

Vaillant boilers don’t currently have any awards for their gas combi boilers, however, in 2020, the brand was awarded the Which? Best Buy Award.

The consumer organisation Which? conducts an annual boiler survey of 7,500 customers and 150 of its trusted heating and plumbing engineers, asking them important questions about reliability, customer service and servicing of various UK boiler manufacturers.

How did Vaillant Boilers Score?

Vaillant Boilers Overall Score

Reliability4 Stars
Customer Score5 Stars
Engineer Recommendation5 Stars
Build Quality5 Stars
Availability of parts and Spares5 Stars
Ease of fixing a common fault5 Stars
Ease of Servicing5 Stars

The above table is based on responses from a May 2018 survey of 11,571 Which? members about Vaillant boilers. 

What Boiler Warranty do Vaillant offer?

Unlike boiler manufacturer’s such as Worcester Bosch, the boiler warranty length with Vaillant depends on the boiler model you choose, but it ranges from 5 years to 10 years. 

For example, the Vaillant EcoTEC Pro comes with a standard 2-year warranty, while the Vaillant EcoTEC plus comes with a 5-year warranty. 

Is this good? Not really, especially when you start to compare it with the likes of brands such as Worcester Bosch who offer a 10 year guarantee.

Who offer the best boilers deals in the UK? Check out our review of online boiler installation companies, boiler brands and the best UK boilers that topped our list concerning new boilers in the current year.

Vaillant Boilers Prices Conclusion

Vaillant boilers is a renowned boiler manufacturer in the UK boiler industry with a good selection of boilers, including combi, regular and system boilers, as well as heat pumps.

They are also available in a wide variety of different sizes/power outputs, so you will easily be able to acquire one that will meet your home’s hot water demands.

However, having said that, we would probably recommend a different boiler brand purely based on other brands offering more generous warranty periods.

For instance, the boiler manufacturer Worcester Bosch offers a very generous decade long guarantee (not just a warranty).