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

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

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 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 included

This includes service and repairs 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.

* Based on 546 customer responses collected between 09/12/14 & 12/12/14.

We value the honest feedback of our customers, so we've partnered with Reevoo - an independent reviews service. Reevoo collects ratings and reviews from people who shop with us. Using a third party ensures there is no bias, editing or fake reviews.

British Gas Boiler Installation Service reviews verified by Reevoo

Quality of the installation
Quality of advice provided by the Heating Adviser (person who gave you your quote)
Overall rating
Scores 8.8 out of 10 based on 1450 reviews
9 out of 10


Newport Pagnell GB
We had a very dedicated fitter; on time and worked long hours. Dealt very well with some problems which occured.
Published on: 27 January 2015
10 out of 10


dundee GB
Work carried out efficiently and quickly despite some hiccups!! Gas engineers were very polite and helpful and worked really hard to complete the installation on time. I can"t praise them enough. Gold stars all round.
Published on: 27 January 2015
10 out of 10


James, the engineer was very professional and co-ordinated everyone so that the job was done very smoothly without any problems. He was very friendly and answered or explained all I needed to know.
Published on: 27 January 2015
9 out of 10


Bristol GB
Excellent service with polite friendly engineers.
Published on: 27 January 2015
3 out of 10


stratford upon avon GB
i have written my review of the installation no respect for the property or the house holder and no introduction to the new boiler we are very dissappointed by the service plus the guy who,came out to check the boiler did not listen to our concerns about the noises made by the boiler he just did his service job:::
Published on: 27 January 2015
9 out of 10


Coventry GB
The adviser and gas installer were lovely and very thorough. They were tidy and friendly and did their work to a high standard. The electrician however, did not introduce himself to us at all and did not fit a new fuse spur as requested (and charged for), he simply used the old one which we had disconnected as we did not know what it supplied(which we would have informed him of had he botherd to talk to us). He also did not fit the cable to the wall securely.

Overall we were very satisfied with our new boiler and the work done by the gas engineer, but bitterly disappointed with the electrician. Also happy that the work was done promptly as we had a small baby to keep warm and no heating or hot water prior to this.
Published on: 27 January 2015