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How Much is a Valliant Boiler? – Cost and Installation (2023)

Vaillant boiler range

You want to know how much is a Vaillant boiler, including costs and installation, and that’s what we are here to find out. With no further ado, let’s dive straight in and find out, shall we?


Key Takeaways

  • The average cost of a Vaillant Boiler with fittings and installation is between £1000 and £3000.
  • The cost of installation will vary depending on where you purchase your new Vaillant boiler, where you live and the complexity of the installation job.
  • Many of the latest Vaillant boilers are solar compatible, and so are a fantastic option if you’re looking to “go green”.

Because you can’t buy a Vaillant boiler directly from Vaillant, there are no set prices either for the boilers or the cost of installation. Get a series of quotes from licensed resellers to see what is best for you.

Vaillant Boiler Prices

As you would expect there is a significant range of prices across Vaillant boilers depending on the type of boiler (Combi, System, Standard – aka regular/conventional) and the size (power output) of the boiler. Vaillant is on the upper end of the price spectrum for boilers as it is a premium brand and was the winner of our Best Premium Brand Boiler category earlier this year. 

On average, a Vaillant boiler can cost anywhere from £800 to £2,500. However, the cost of installation is usually not included in this price and can add an additional £500 to £1,500, depending on the complexity of the installation.

Vaillant Boiler Installation Cost

Installation costs for a Vaillant boiler will vary depending on numerous factors, including the company you purchase your Vaillant boiler from, your regional location, whether it’s a straightforward installation or a boiler replacement that involves the removal of your old boiler, and if you require any additional parts or labour. 

In the table below, we break down the typical costs of both purchasing and installing Vaillant boilers:

Boiler Type Cost of Boiler (UK)
Vaillant Combi Boiler £800 to £2,500
Vaillant Combi Boiler with Installation £1,000 to £2,700
Vaillant System Boiler £800 to £2,000
Vaillant System Boiler with Installation £1,100 to £3,300
Conventional Vaillant Boiler £800 to £2,500
Conventional Vaillant Boiler with Installation £1,100 to £3,500

Which Vaillant Boiler?

Now we are going to take a closer look at some of our top picks for Vaillant conventional, system, and combi boilers and give you a breakdown of how they perform and how much it will cost to get your new Vaillant boiler installed with Boiler Choice.

Vaillant Standard Boiler Top Pick

Vaillant Eco Tec Plus Heat 415

Vaillant Eco Tec Plus Heat 415

The Vaillant Eco Tec Plus Heat 415 is our top pick for Vaillant standard boilers, as it’s an extremely durable and reliable boiler, and one that’s available at a very reasonable price. 

It’s a gas-fuelled, condensing boiler which boasts a 90%+ efficiency rating and comes with a 10-year warranty as standard. Another benefit of the 415 is its in-built two-stage frost protection; this ensures optimal performance all year round and provides your heating system with additional protection in the winter months when it’s needed most.

This boiler is most suitable for use in smaller properties, it can support up to ten radiators with ease and it does so with great efficiency.

Vaillant Eco Tec Plus Heat 415 | Key Details

Boiler Type Standard
Fuel Type Gas
Standard Warranty 10 years
Central Heating Output 15kW
Is Condensing Condensing
Efficiency Rating 90.50%
Band Rating A-Rated
ERP Rating A-Heat
LPG Compatible No
Solar Compatible No

For a complete overview of the Vaillant Eco Tec Plus Heat 415 take a look at our full product review.

Vaillant Eco Tec Plus Heat 415 Price with Installation from Boiler Choice | £891.90 (Excl. Vat)

Vaillant System Boiler Top Pick

Vaillant Eco Tec Plus System 618

Vaillant Eco Tec Plus System 618

The Eco Tec Plus System 618 is a highly-efficient conventional boiler. They say good things come in small packages and the 618’s compact design goes a long way to prove the point. It will fit in any cupboard space and the fact that it’s not only lightweight, but the most lightweight in its class, means installation is a breeze. 

Vaillant’s Eco Tec Plus System 618 is controllable with the latest Intelligent controls allowing you to handle every aspect of use and programming from your phone or other wireless devices. 

It’s also LPG and solar compatible making it particularly suitable for remote properties or people looking to move to a more environmentally-friendly heating system or become less dependent on the grid.

Vaillant Eco Tec Plus System 618 | Key Details

Boiler Type System
Fuel Type Gas
Standard Warranty 5 years
Central Heating Output 19kW
Is Condensing Condensing
Efficiency Rating 94%
Band Rating A-Rated
ERP Rating A-Heat
LPG Compatible Yes
Solar Compatible Yes

If this looks like it might be a good fit for your home, please visit our full review.

Vaillant Eco Tec Plus System 618 Price with Installation from Boiler Choice | £1,074.65 (Excl. Vat)

Vaillant Combi Boiler Top Pick

Vaillant Eco Fit Pure 825


As with most Vaillant boilers, the Pure 825 is compact, easy to operate and install and comes with a good length standard warranty. Of particular note is the fact that this model comes with an aluminium heat exchanger which allows it to punch above its weight, in terms of output, whilst remaining extremely energy-efficient.

We recommend this model for smaller to mid-sized homes with a single bathroom but if you require something for a larger property, Eco Fit Pure boilers are also available with 30kW and 35kW capacity, too.

Vaillant Eco Fit Pure 825 | Key Details

Boiler Type Combi
Fuel Type Gas
Standard Warranty 7 Years
Central Heating Output 19kW
Is Condensing Condensing
Efficiency Rating 94%
Band Rating A-Rated
ERP Rating A-Heat
LPG Compatible Yes
Solar Compatible No

Any other information you might want to know about the Eco Fit Pure 825 can be found in our must-read Eco Fit Pure 825 boiler review.

Vaillant Eco Tec Pure 825 Price with Installation from Boiler Choice | £1,064.47 (Excl. Vat)

Frequently Asked Questions (FAQs)

Are Vaillant Boilers Any Good?

Absolutely! Not only is Vaillant one of the oldest and most recognised manufacturers of heating systems in the UK but they currently have a top rating of “Excellent” on Trustpilot from nearly 20,000 customer reviews.

How Long Does a Vaillant Boiler Last?

According to Vaillant, one of their boilers should typically last between 10 and 15 years. This is conditional on how it is used, how well it is maintained, and if it is serviced regularly or not. If you maintain your boiler well, there’s no reason why you should need a new Vaillant boiler installed anytime before that 10 to 15 year mark.


As you’ll have seen become apparent, it’s hard to put a definitive answer to the question of Vaillant boiler costs, because you’ll always have to purchase your new Vaillant heating system through a third party. That being the case you should always look around for different quotes to make sure you are getting the best deal.

Boiler Choice prides itself on providing the best heating systems at the best prices, installed and serviced by only the best engineers. If you’re interested in finding out if a Vaillant boiler could be the right candidate for your needs, then get in touch today. Alternatively, get started right now by completing our online questionnaire for an instant quote.

Boiler Choice Director & Founder

This blog was written in collaboration with Eddie Scoffin, the founder of Boiler Choice. Eddie has been installing boilers for over a decade. With a passion for excellence and customer satisfaction, Eddie’s leadership and expertise have been instrumental in the success of Boiler Choice. His commitment to making the boiler installation process hassle-free for customers has earned him a respected reputation in the industry.

Updated on April 24, 2023