Vaillant boilers

Vaillant have a reputation for producing boilers that combine outstanding performance and reliability.

Engineered in Germany and manufactured in the UK, their range of highly efficient ecoTEC combi boilers have won numerous awards.

Our Heating Advisers can help you choose the right boiler for you.

Or, take a look at the other boilers in our range.

Vaillant Combi boilers



Maximum  Flow Rate


Efficiency Rating

Vaillant ecoTEC Pro 24

H - 720mm

W - 440mm

D - 335mm

9.4 ltrs per min 23.4kW A-rated - 91%
Vaillant ecoTEC Pro 28

H - 720mm

W - 440mm

D - 335mm

11.5 ltrs per min
28kW A-rated - 91%
Vaillant ecoTEC Plus 831

H - 720mm

W - 440mm

D - 338mm

12.4 ltrs per min
31kW A-rated - 91%

Vaillant System boilers

Model Dimension Output Efficiency rating
Vaillant ecoTEC Plus 615 System

H - 720mm

W - 440mm

D - 338mm

15kW A-rated - 91%
Vaillant ecoTEC Plus 630 System

H - 720mm

W - 440mm

D - 372mm

30kW A-rated - 91%

More useful information

We have offers and discounts available for a limited time only.

Get an estimated cost for installing a new boiler.

A guide to getting a new boiler with British Gas.

Reasons to choose British Gas

Fixed price quote

We guarantee a fixed price

When our Heating Advisors quotes a price, we guarantee it won’t increase even if there’s unexpected work to do.

Boiler cost calculator

No deposit

Pay monthly with no upfront deposit

We could help you spread the cost over 3-10 years or you could choose to pay in full if you’d prefer.

Payment options

Your home is left clean and safe

Your home is left clean and safe

Our Engineers leave your home neat and tidy and will arrange the safe disposal of all waste.

Step by step guide

Free aftercare

Aftercare included

This offer includes HomeCare 200™ which provides service and repair for your boiler, controls and central heating system for one year.

Latest offers

British Gas New Heating Limited is authorised and regulated by the Financial Conduct Authority for its consumer credit activities.

* 91% recommendation rating is based on 1,463 customer responses collected between 09/12/2014 & 02/02/2015.

91% of customers recommend British Gas boiler installations*. See below for more detail on how they rate it. Reevoo

British Gas Boiler Installation Service reviews verified by Reevoo

Quality of installation
Advice from Heating Adviser
Overall rating
Scores 8.8 out of 10 based on 2316 reviews
9 out of 10


Patchway, Bristol
Everything went ok. I was quoted 2 days for the work but it was done in a day
Published on: 05 March 2015
10 out of 10


installerbwas on time and courteous. Kept the area clean and tidy and was able to explain all details regarding installation and workings of the boiler and the Hive system that we also got installed.
Published on: 05 March 2015
9 out of 10


Very efficient and straightforward installation process with a prompt initial response and no delays. Advice and instruction was clear and to the point and aftersales care so far excellent.
Published on: 05 March 2015
10 out of 10


Motcombe, Shaftesbury
Excellent and prompt service right from the breakdown to surveyor to Installation. Alan who did the installation was particularly professional, very hard working and very skilled and precise in all that he did.
Published on: 05 March 2015
9 out of 10


very good service.
reasonable price and no im protected for future repairs.
quick installing and very polite.
Heating advisor very polite and not pushy.
would recommend.
Published on: 05 March 2015
10 out of 10


Very happy from start to finish. A clean and tidy job and the boiler has made such a difference my house is so warm this winter.
Published on: 05 March 2015