Are you feeling the chill because your old boiler isn’t up to the job? Or maybe you’re looking for a boiler that won’t send your energy bills through the roof? Then I think the Vaillant boiler is just what you need.
If you are trying to keep your home warm and cosy, Vaillant combi boilers stand out as one of the top choices for UK homeowners. But what makes them special, and most importantly, how much will one cost you?
When it comes to keeping your home warm and cosy, Vaillant combi boilers stand out as one of the top choices for UK homeowners. But what makes them special, and most importantly, how much will one cost you?
What Makes Vaillant Boilers So Popular?
Vaillant has been warming homes since 1874, that’s nearly 150 years of heating experience. They’ve earned an impressive 4.5 out of 5 rating on Trustpilot, showing just how happy their customers are.
What exactly is a combi boiler? It’s a clever all-in-one system that handles both your central heating and gives you instant hot water without needing separate water storage tanks. This makes them perfect for homes where space is tight.
The range of Vaillant boilers includes different types to suit every home:
- Combi boilers (the most popular)
- System boilers (for homes with higher hot water demands)
- Regular boilers (traditional systems with cold water storage tanks)
But today, we’re focusing on their fantastic combi boiler range!
Meet the Vaillant Combi Boiler Family
1. Vaillant ecoTEC Pro Series
The ecoTEC Pro is perfect if you’re looking for a reliable, compact boiler that won’t break the bank. These neat units are ideal for small to medium-sized homes with 1-2 bathrooms.
What’s special about it?
- It adjusts itself to give you just the right amount of heat
- Works with weather compensation systems to save you money
- The ecoTEC Pro 28 kW model gives you 11.1 liters of hot water every minute!
2. Vaillant ecoTEC Plus Series
Want something with a bit more tech? The ecoTEC Plus range is Vaillant’s mid-range champion, packed with smart features.
Why might you choose this one?
- Works with smart heating controls through OpenTherm connection
- Adjusts power use automatically based on your home’s heating needs
- Perfect for tech-savvy homeowners who want more control
3. Vaillant ecoFIT Pure Series
On a tighter budget but still want Vaillant quality? The ecoFIT Pure might be your answer!
What makes it great?
- More affordable while still offering excellent efficiency
- Maintains the core Vaillant reliability
- Ideal for straightforward heating needs
Check Eligibilty For ECO4 Scheme
Get Free Heating System Installed Today at your Property Under ECO4!
GOODBased on 277 reviews
Trustindex verifies that the original source of the review is Google.
Lawrence Setchell2025-11-19Great and friendly service, from the office to the engineers. Very hassle free and quick serviceTrustindex verifies that the original source of the review is Google.
teresa nowers2025-11-07Excellent service, helpful and polte. Hard working too.Trustindex verifies that the original source of the review is Google.
Laura O'Neill2025-10-29Fantastic service by all the team involved.Trustindex verifies that the original source of the review is Google.
jenny marshall-fox2025-10-28My boiler broke down and within two weeks a new one fitted very quick service, three men came at 11am and stayed late until finished and working, they had a lot of problems that were unexpected but worked well and were very clean workers, and polite, I would recommend to anyone.Trustindex verifies that the original source of the review is Google.
Sarah Mansfield2025-10-24Highly recommended, surveyors did a brilliant job ,they came out on a Saturday, paperwork completed by Wednesday and jobs booked in for thu and Fri this week ,I'm so pleased first team arrived on time did loft insulation on our loft , extractor fans in 3 bathrooms and our kitchen , and fitted trickle vents to all windows ,did a great job ,friendly ,polite and got the job done .on Friday the combi boiler guys arrived ,smart h and p solutions limited ,and they did a fantastic job, lovely friendly polite guys done a professional job went above and beyond ,removal of a very old broken system, replaced all pipe works and installed new combi boiler system, and fitted smart valves on all radiators ,left everything clean And tidy and covered stairs flooring etc ,done a fantastic job and the house is lovely and warm ,I can't recommend them enough, they really have done such a lovely job .highly recommended the process has been so quick and everyone involved have done a great job .thank you all .
How Much Does a Vaillant Boiler Cost?
The big question! Let’s break it down in simple terms:
Boiler Unit Prices
| Vaillant Boiler Model | Output (kw) | Hot Water Flow (L/min) | Unit Price Only |
|---|---|---|---|
| ecoTEC Pro 28 | 25.9 CH/27.2 DHW | 11.1 | £1,119–£1,450 |
| ecoTEC Plus 832 | 30.4 CH/30.0 DHW | 12.4 | £1,600–£1,900 |
| ecoFIT Pure 825 | 25.0 CH/25.0 DHW | 10.2 | £800–£1,100 |
But remember, the boiler unit is just part of the story! The installation costs typically add another £500–£1,500 to your bill.
What Might Increase Your Installation Costs?
Wondering why there’s such a wide range in installation prices? Here’s what can bump up the cost:
- System upgrades: Things like power flushing (£300–£600) or adding a magnetic filter (£90) to protect your new boiler
- Changing fuel types: Switching from regular gas to LPG? That’ll be about £200–£400 extra
- Moving your boiler: Need it in a new spot? Expect to pay £150–£300 more for new pipework and flue adjustments
What's Included in Vaillant Boiler Installation?
When you get a quote for installation, here’s what should be covered:
| Part of Installation | Cost Range | What You Get |
|---|---|---|
| Basic boiler installation | £500–£1,000 | Mounting, connecting pipes, and safety checks |
| Flue system | £80–£200 | The pipe that safely removes gases outside |
| Programmable thermostat | £120–£250 | Controls to set your heating schedule |
| Condensate drain | £50–£150 | Removes water produced by your efficient boiler |
Did you know? Installation prices can be 15-20% higher in London and the Southeast compared to the rest of the UK. Always get a few quotes to compare!
Which Vaillant Boiler is Right for Your Home?
For Small to Medium Homes: ecoTEC Pro 28 kW
Perfect for: 2–3 bedroom homes with a single bathroom Efficiency: 94% ErP rating (very efficient!) Total cost installed: £1,919–£2,419
Imagine never running out of hot water when you need a shower, while still keeping your energy bills in check!
For Smart Home Enthusiasts: ecoTEC Plus 832
Perfect for: Homes that want smart control and top efficiency Efficiency: 94% ErP rating plus clever load compensation Total cost installed: £2,300–£2,800
Want to control your heating from your phone? This could be your ideal match!
For Budget-Conscious Homeowners: ecoFIT Pure 825
Perfect for: Those who want Vaillant quality at a lower price Efficiency: 92% ErP rating (still very good!) Total cost installed: £1,300–£1,600
Why compromise on quality when you can get Vaillant reliability at a more affordable price?
Final Thoughts
Vaillant combi boilers offer excellent solutions for homes of all sizes, with options that balance efficiency and cost. Their range of domestic boilers has something for everyone, whether you’re looking for top-of-the-line features or a more budget-friendly option.
To get the best deal:
- Always get 3-5 quotes from different installers
- Check if they’re Vaillant Advance Installers (they may offer better warranty terms)
- Verify all Gas Safe credentials before work begins
- Ask about the boiler protection kit options (it can extend your boiler’s life)
If you’re considering a Vaillant boiler, it’s smart to also know what common issues may arise and how to handle them our Vaillant boiler problems and solutions guide is a great place to start.
Ready to enjoy reliable heating and instant hot water? A new Vaillant boiler could transform your home comfort while keeping those energy bills in check.
FAQs
While combi boilers themselves aren’t covered by grants, you might be interested in the Boiler Upgrade Scheme (BUS). This offers £7,500 toward air-source heat pumps like the Vaillant aroTHERM range, which are even more eco-friendly than gas boilers.
Wondering if you’ll be without heating for days? Good news:
- Standard boiler replacements: Just 1 day in most cases
- System conversions (regular to combi): 2–3 days
Thinking of a DIY project? Stop right there! Gas Safe Register regulations require certified engineers for all gas work. It’s not just about following the law—it’s about your family’s safety.
Always check that your installer is Gas Safe registered before letting them work on your heating system.
Most basic installations don’t automatically include the latest smart controls. Vaillant’s vSmart TRV2 kit adds about £230–£300 to your installation but gives you app control and can save money over time by managing your heating more efficiently.


