Are you looking to buy a new Vaillant boiler and don’t know where to start? Don’t worry – we’ve put together a comprehensive guide to buying your new Vaillant. Keep reading to find out why Vaillant is one of the best boiler manufacturers in the industry.
New Vaillant Boiler
When buying a new or replacement boiler, it’s important to consider all aspects such as efficiency, reliability, and boiler price to ensure that you choose the right boiler for you and your home.
This blog is the ultimate boiler price guide for all Vaillant boilers on the market — fact! Remember that boiler installation prices can vary depending on the model and kW output you choose. There are also other factors that may affect the cost, such as your current heating system setup, installation costs, and additional extras.
Vaillant Boiler Reviews
With an average rating of 4.6 out of 5 on Trustpilot from over 14,500 reviews, it’s clear that Vaillant is a reliable and efficient boiler brand offering great value for money.
“New boiler better than expected. Good quality, reliable and recommend to everyone.”
“Excellent customer service, professional service. Kept me well informed throughout the day. Gave lots of information on the boiler and how to maintain it. Job done quickly.”
In the Which? Best Boiler Brand survey, Vaillant achieved an impressive 80% overall score. They earned:
- 4 stars for brand reliability
- 5 stars for customer score
- 5 stars for ease of servicing
- 5 stars for parts availability
- 4 stars for engineer recommendation
- 5 stars for build quality
Which? says: “Vaillant makes fantastic boilers that have a good reliability record. It delights its customers and has a five-star customer score. Engineers love the brand too, giving it five-star scores almost across the board. That’s why we’ve made Vaillant a Best Buy.”
The History Behind Vaillant
Vaillant was founded in 1874 by Johann Vaillant in Remscheid, Germany. Many inventions have been credited to Vaillant over the years, including modern-day central heating in 1924. Previously, each room was heated individually until Vaillant introduced the first central heating boiler capable of heating multiple radiators simultaneously — revolutionising home heating.
Today, Vaillant boilers have earned the Which? Best Buy award and the Quiet Mark Accreditation from the Noise Abatement Society for their near-silent operation.
Understanding Boiler Types
Vaillant offers a range of boilers including combi, system, and regular (heat-only) boilers. Here’s a quick breakdown:
- Combi boilers – No storage tanks, provide heating and hot water on demand.
- System boilers – Have a hot water cylinder (ideal for homes with more than one bathroom).
- Regular boilers – Include a hot and cold water tank, ideal for homes with low water pressure.
All Vaillant boilers are condensing boilers, which are legally required in the UK due to their energy efficiency. Condensing technology reuses heat that would otherwise be lost, saving energy and reducing carbon emissions.
Vaillant Combi Boiler Prices
Combi boilers are the most common type of boiler in UK homes, combining heating and hot water in one compact unit. They’re perfect for smaller homes and flats where space is limited.
The Benefits of a Combi Boiler
- Perfect for compact homes with limited space
- No need for a storage tank or extensive pipework
- Cost-effective and easy to install
- Provides hot water on demand
- Highly energy-efficient, heating water only when needed
The Cons of a Combi Boiler
- Relies on mains water pressure
- Not suitable for homes with multiple bathrooms in simultaneous use
- Not compatible with power showers
- No backup hot water storage tank
Vaillant Combi Gas Boiler Price Comparison Table
| Model | kW Output | Vaillant Combi Boiler Price* |
|---|---|---|
| ecoTEC Plus 825 | 25.4kW | £1,952 – £2,452 |
| ecoTEC Plus 832 | 31.8kW | £2,048 – £2,548 |
| ecoTEC Plus 835 | 35.0kW | £2,231 – £2,731 |
| ecoTEC Plus 838 | 38.7kW | £2,208 – £2,708 |
| ecoTEC Plus 938 | 38.7kW | £2,503 – £3,003 |
| ecoTEC Pro 24 | 23.4kW | £1,815 – £2,315 |
| ecoTEC Pro 28 | 27.2kW | £1,919 – £2,419 |
| ecoTEC Pro 30 | 30.0kW | £2,011 – £2,511 |
| ecoFIT Pure 825 | 25.2kW | £1,707 – £2,207 |
| ecoFIT Pure 830 | 30.0kW | £1,858 – £2,358 |
| ecoFIT Pure 835 | 35.0kW | £1,992 – £2,492 |
| ecoTEC Exclusive Green IQ 835 | 35.3kW | £2,225 – £2,725 |
| ecoTEC Exclusive Green IQ 843 | 43.4kW | £2,473 – £2,973 |
All WarmZilla Boiler Prices Include Installation
All WarmZilla boiler prices include Gas Safe installation as standard — along with a system filter, system cleanse, guarantee, smart thermostat, and any other parts needed to get your boiler up and running.
Not all prices online include installation, and fitting a boiler can cost over £1,000 alone. Save yourself time and get a fixed price with our quick boiler survey. It only takes a few minutes and shows you exactly what boiler suits your home and budget.
Vaillant System Boiler Prices
Before we get into the Vaillant System boiler prices, let’s discuss what a system boiler is and how it works.
What is a System Boiler?
System boilers are typically found in homes with high hot water demand. In a system boiler, cold water enters the boiler directly from the mains supply and is heated via a heat exchanger. Once heated, the water is pumped into a hot water cylinder where it is stored until required. This means multiple bathrooms can use hot water simultaneously without affecting home heating performance.
The Benefits of a System Boiler
- Easy installation as components are built-in
- No cold water storage tank required, saving space
- Meets high hot water demands without sacrificing pressure
- Energy-efficient and compatible with renewable energy sources such as solar thermal systems
The Cons of a System Boiler
- Requires a large hot water storage tank — not ideal for small homes or flats
- Some heat loss from the storage tank, even when insulated
- Hot water is limited to the tank’s capacity — once used, you’ll need to wait for it to reheat (unlike a combi boiler)
Vaillant System Gas Boiler Price Comparison Table
| Model | kW Output | Vaillant System Boiler Price* |
|---|---|---|
| ecoTEC Plus 612 | 12.2kW | £1,702 – £2,202 |
| ecoTEC Plus 615 | 15.4kW | £1,771 – £2,271 |
| ecoTEC Plus 618 | 18.5kW | £1,898 – £2,398 |
| ecoTEC Plus 624 | 24.4kW | £2,027 – £2,527 |
| ecoTEC Plus 630 | 30.4kW | £2,163 – £2,663 |
| ecoTEC Plus 637 | 37.6kW | £2,337 – £2,837 |
| ecoFIT Pure 612 | 12.6kW | £1,694 – £2,194 |
| ecoFIT Pure 615 | 15.2kW | £1,780 – £2,280 |
| ecoFIT Pure 618 | 18.3kW | £1,858 – £2,358 |
| ecoFIT Pure 625 | 25.4kW | £2,043 – £2,543 |
| ecoFIT Pure 630 | 30.5kW | £2,027 – £2,527 |
| ecoTEC Plus 48 | 48.0kW | £3,064 – £3,564 |
| ecoTEC Plus 64 | 64.0kW | £3,500 – £4,000 |
| ecoTEC Exclusive 627 | 26.7kW | £2,190 – £2,690 |
If you’re looking to buy a new boiler, get a boiler quote from WarmZilla. It only takes two minutes, no technical knowledge needed — and it’s all done online. Easy!
Vaillant Regular Boiler Prices
What is a Regular Boiler?
Regular boilers (also known as conventional, heat-only, or open-vent boilers) are the most complex to install or replace. They include a boiler unit, a hot and cold water storage tank, and an expansion cistern. These take up significant space, which is why many homeowners now opt to replace them with modern combi boilers.
That said, regular boilers remain ideal for larger or older homes with existing pipework, or where mains water pressure is low. Like system boilers, they can supply large amounts of hot water to multiple bathrooms at once.
The Benefits of a Regular Boiler
- Can supply hot water to multiple bathrooms simultaneously
- Maintains consistent water pressure
- Ideal for older homes with existing pipe systems
- Compatible with solar panels and heat pump systems
The Cons of a Regular Boiler
- Requires substantial space for tanks and the boiler itself
- Hot water limited by the tank’s capacity
- Heat loss from storage tank over time
- Difficult to install — typically only suitable as a replacement
Vaillant Regular Gas Boiler Price Comparison Table
| Model | kW Output | Vaillant Regular Boiler Price** |
|---|---|---|
| ecoTEC Plus 412 | 12.3kW | £1,605 – £2,105 |
| ecoTEC Plus 415 | 15.1kW | £1,711 – £2,211 |
| ecoTEC Plus 418 | 18.3kW | £1,759 – £2,259 |
| ecoTEC Plus 424 | 24.6kW | £1,807 – £2,307 |
| ecoTEC Plus 430 | 30.5kW | £1,967 – £2,467 |
| ecoTEC Plus 435 | 35.1kW | £2,253 – £2,753 |
| ecoFIT Pure 412 | 12.3kW | £1,592 – £2,092 |
| ecoFIT Pure 415 | 15.2kW | £1,592 – £2,092 |
| ecoFIT Pure 418 | 18.3kW | £1,665 – £2,165 |
| ecoFIT Pure 425 | 25.4kW | £1,776 – £2,276 |
| ecoFIT Pure 430 | 30.5kW | £1,802 – £2,302 |
| ecoFIT Pure 435 | 34.8kW | £2,333 – £2,833 |
If you would like an online boiler quote in just a few minutes, get a boiler quote from WarmZilla now.
Vaillant Boiler Maintenance & Service
Like any heating appliance, boilers can develop issues over time. The best way to prolong your boiler’s lifespan is to have it serviced annually by a qualified Gas Safe engineer. Regular servicing ensures your boiler operates efficiently and safely, while reducing energy bills and preventing costly breakdowns.
Other ways to extend your boiler’s life include bleeding radiators, fitting a magnetic filter, adding inhibitors, insulating pipes, and keeping your system clean. For more advice, check out our blog on 7 ways to increase boiler lifespan.
Vaillant Boiler Safety
Boilers that are not properly maintained can pose safety risks such as carbon monoxide leaks — a colourless, odourless, and deadly gas. Regular professional servicing ensures your boiler remains safe and efficient.
Refer to our boiler fault codes blog for more details on potential issues and what they mean. To learn more about carbon monoxide safety, click here.
Vaillant Boiler Warranty
Vaillant boilers include a standard warranty ranging from 2 to 5 years. However, when purchasing through WarmZilla, your warranty is extended up to 10 years.
To keep your warranty valid, your boiler must be registered within 30 days of installation and serviced annually by a certified Gas Safe engineer.
Vaillant Boiler Fault Codes
For a full list of Vaillant boiler fault codes, visit our dedicated blog. It includes common issues such as boiler pressure errors and guidance on troubleshooting.
Important: You should never attempt to repair a boiler yourself unless you are a qualified Gas Safe registered engineer.
Have a question? Please contact us on Live Chat
About the Author