Vaillant Boiler Prices 2026: Full Range Cost Guide
Quick Answer
Vaillant boiler prices in 2026 range from around £920 for an entry-level combi up to £1,700 or more for their premium models. These figures cover the unit only and do not include installation costs.
Vaillant sits in the high mid-range of the UK boiler market and is widely regarded as one of the best value premium brands available.
For a closer look at what installation adds to the total, our guide to vaillant boiler installation costs explained breaks down labour and material costs in more detail.
Vaillant is one of the most recognised boiler brands in the UK, and for good reason. As the company that pioneered the modern combi boiler, it has over a century of heating expertise behind every product it makes, and the ecoTEC and ecoFIT ranges are among the most widely installed boilers in British homes.
This guide covers the full Vaillant boiler price range across all three boiler types, so you know exactly what to budget before requesting a quote.
Vaillant isn’t the only premium name worth comparing before you commit. Our guide to Viessmann boiler efficiency ratings explained is a good next read if you want to weigh the two head-to-head.
Are Vaillant Boilers Worth the Price?
Vaillant isn’t the cheapest option on the market, but price alone rarely tells the full story with boilers.
A less expensive boiler that fails within five years and needs a costly emergency replacement will quickly outspend a more reliable unit that runs efficiently for fifteen years with nothing more than an annual service.
Reliability matters just as much as sticker price over a boiler’s lifetime. If you already own a Vaillant and want to understand a common issue, our guide to the vaillant f75 fault code explained covers what it means and how it’s usually resolved.
Upgrading to a new A-rated condensing boiler can save homeowners up to £320 a year on energy bills compared with an older, inefficient model, according to the Centre for Sustainable Energy, citing Energy Saving Trust figures. Factor that saving in alongside a longer lifespan and a stronger warranty, and Vaillant’s higher upfront cost becomes considerably easier to justify over the long term.
Vaillant Combi Boiler Prices
Vaillant combi boilers are the most popular type in the range and suit the majority of UK homes, where a single unit handles both central heating and on-demand hot water. Prices vary across five models depending on output and specification.
| Model | Output | Unit Price |
|---|---|---|
| Vaillant ecoFIT Pure 825 | 25kW | From £920 |
| Vaillant ecoTEC Pro 24kW | 24kW | From £1,000 |
| Vaillant ecoFIT Plus | 30kW | From £1,300 |
| Vaillant ecoTEC Green iQ | 35kW | From £1,600 |
| Vaillant ecoTEC Plus 938 | 35kW+ | From £1,700 |
Vaillant ecoFIT Pure 825
The ecoFIT Pure 825 has earned a reputation as the go-anywhere boiler in the Vaillant range. It combines a compact footprint with ultra-quiet operation, which makes it ideal for homes where kitchen or utility cupboard space is tight.
At around £920 for the 25kW version, it’s the most affordable entry point into the Vaillant combi range. It delivers reliable performance for smaller homes and flats, and it’s straightforward for engineers to install and service.
Vaillant ecoTEC Pro 24kW
The ecoTEC Pro is designed for homes with up to three bedrooms and one bathroom, making it one of the most commonly specified Vaillant boilers for standard UK terraced and semi-detached properties.
It includes a high-efficiency pump to reduce energy consumption during operation and is priced at around £1,000 for the 24kW model. It sits neatly between the entry-level ecoFIT Pure and the more premium ecoFIT Plus.
Vaillant ecoFIT Plus Combi
The ecoFIT Plus is Vaillant’s most versatile mid-range combi boiler, described as a genuine all-rounder suited to most home sizes. It delivers hot water within five seconds of demand and comes with a 5-year guarantee as standard, extendable to 7 or 10 years through a Vaillant advanced installer.
The 30kW model is priced at around £1,300 and is the most commonly recommended size for homes with two bathrooms, or a bathroom and a separate shower room.
Vaillant ecoTEC Green iQ
The ecoTEC Green iQ is arguably the most sophisticated combi boiler in the Vaillant range. Green iQ technology intelligently manages both consumption and output, keeping components running at peak efficiency throughout the boiler’s life.
At around £1,600 for the 35kW model, it sits at the premium end of the combi range and suits larger homes with higher heating and hot water demand. It’s compatible with Vaillant’s vSMART app for full remote control from a smartphone.
Vaillant ecoTEC Plus 938
The ecoTEC Plus 938 is Vaillant’s highest-specification combi boiler. It includes integrated hot water storage, delivering hot water within five seconds and supplying up to 20 litres per minute, a flow rate that can comfortably serve multiple outlets at once.
Priced at around £1,700, it’s the most expensive combi in the Vaillant range and is aimed at larger homes that want the space-saving benefits of a combi without sacrificing hot water performance.
Vaillant System Boiler Prices
Vaillant system boilers work alongside an external hot water cylinder to store heated water at mains pressure, delivering consistent flow rates to multiple outlets simultaneously. They suit larger homes with two or more bathrooms where hot water demand is regularly high.
| Model | Output Range | Unit Price |
|---|---|---|
| ecoFIT Pure 612 System | 12kW | From £1,050 |
| ecoTEC Plus System | 12kW – 37kW | £950 – £1,540 |
| ecoTEC 627 Exclusive Green iQ | 27kW | From £1,400 |
Vaillant ecoFIT Pure 612 System Boiler
The ecoFIT Pure 612 is the entry-level system boiler in the Vaillant range, fitted with an aluminium heat exchanger built for strong performance and low energy consumption in typical domestic use.
The 12kW model retails at around £1,050, making it one of the more accessible system boiler options from a premium manufacturer, particularly for a like-for-like replacement.
Vaillant ecoTEC Plus System Boiler
The ecoTEC Plus is the most versatile system boiler in the Vaillant range, spanning outputs from 12kW up to 37kW to cover everything from smaller terraced homes through to large family properties.
Prices run from £950 for the 12kW model up to £1,540 for the 37kW version, with a 5-year standard warranty extendable to 10 years through a Vaillant advanced installer.
For a deeper dive into performance data, our full vaillant ecoTEC plus efficiency ratings review covers modulation, flow rates and real-world running costs for this exact range.
It provides low energy consumption for both central heating and hot water circuits and is one of the most widely installed system boilers across the UK.
Vaillant ecoTEC 627 Exclusive Green iQ System Boiler
The ecoTEC 627 Exclusive Green iQ is Vaillant’s premium system boiler, available in a single 27kW output. It’s built for maximum energy efficiency and minimum running costs, with the Green iQ system keeping components at optimal performance throughout the unit’s lifespan.
Priced at around £1,400, it’s compatible with Vaillant’s vSMART control system for full smartphone-based remote management of the heating system.
Vaillant Regular Boiler Prices
Regular boilers, also known as conventional or heat-only boilers, require both a hot water cylinder and a cold-water tank. They suit older properties with traditional central heating systems already in place. Vaillant offers two regular boiler models, both across multiple outputs.
| Model | Output Range | Unit Price |
|---|---|---|
| ecoTEC Plus Regular | 12kW – 35kW | Up to £1,150 (35kW) |
| ecoFIT Pure Regular | 12kW – 35kW | Up to £1,500 (35kW) |
Vaillant ecoTEC Plus Regular
The ecoTEC Plus Regular is available in six output sizes from 12kW to 35kW and is compact enough to fit inside a standard kitchen cupboard despite being a regular boiler.
It carries an ErP A efficiency rating, meaning it meets the highest energy performance standard and delivers lower running costs than older, non-condensing regular boilers. The 35kW model is priced at around £1,150.
Vaillant ecoFIT Pure Regular
The ecoFIT Pure Regular is a lightweight, compact regular boiler built around a powerful aluminium heat exchanger that delivers strong performance alongside low energy consumption.
It’s also available in six output sizes, with the 35kW model priced at around £1,500. The higher price compared to the ecoTEC Plus Regular reflects the more premium build specification.
Vaillant Boiler Warranties Explained
Warranty length varies significantly across the Vaillant range and is worth checking carefully before making a final purchase decision. Standard warranties run from 2 to 5 years depending on the model, with extensions of up to 10 years available when the boiler is installed by a Vaillant advanced installer rather than a standard Gas Safe engineer.
| Model Type | Standard Warranty | Maximum Extended Warranty |
|---|---|---|
| ecoFIT Pure combi | 5 years | 7 years |
| ecoFIT Plus combi | 5 years | 10 years |
| ecoTEC Pro | 5 years | 10 years |
| ecoTEC Plus (all types) | 5 years | 10 years |
| ecoTEC Green iQ | 5 years | 10 years |
Using an approved Vaillant advanced installer, rather than any Gas Safe engineer, is worth factoring into installation planning. It’s what unlocks the maximum warranty, and it also means the boiler is commissioned to the manufacturer’s exact specification.
Vaillant Installation Costs
The prices listed throughout this guide cover the boiler unit only and do not include installation. Installation costs for a Vaillant boiler typically add between £700 and £1,500 to the total, depending on the complexity of the job, the type of boiler being replaced, and the region of the UK.
Installation is only the first cost. Our guide to Vaillant boiler pricing for services covers what annual servicing typically costs too, which is worth budgeting for alongside the upfront price.
A straightforward like-for-like combi replacement in a standard kitchen cupboard will sit at the lower end of that range. More complex jobs involving new pipework, a system conversion, or cylinder installation will cost more.
Always request a fully itemised quote that includes all parts, labour, and any required building work before agreeing to proceed.
Are Vaillant Boilers Covered by Government Grants?
If you’re weighing up a new gas boiler against a grant-funded alternative, it’s worth knowing where Vaillant’s gas range actually stands. None of the Vaillant combi, system or regular gas boilers covered in this guide qualify for the Boiler Upgrade Scheme.
The Boiler Upgrade Scheme is reserved for air-to-water, air-to-air and ground-source heat pumps, plus biomass boilers in rural, off-grid properties. A standard gas boiler replacement, whatever the brand, sits outside the scheme entirely.
Vaillant does make heat pumps too, and those may qualify for the current £7,500 grant, rising to £9,000 for oil or LPG homes switching between now and 31 March 2027. That’s a separate purchase decision from anything on this page, and worth a conversation with your installer if low-carbon heating is on the table.
FAQ
How much does a Vaillant boiler cost in 2026?
Vaillant boiler prices in 2026 start at around £920 for the ecoFIT Pure 825 combi and rise to approximately £1,700 for the premium ecoTEC Plus 938.
These prices cover the unit only and don’t include installation, which typically adds between £700 and £1,500 depending on the complexity of the job. The average total installed cost for a mid-range Vaillant combi boiler is around £2,000 to £2,500 depending on the model and location.
Which is the best Vaillant combi boiler?
The Vaillant ecoTEC Green iQ is arguably the most capable combi boiler in the range, with intelligent consumption management, low maintenance requirements, and vSMART app compatibility for remote control.
For homeowners who want strong performance at a lower price, the ecoFIT Plus is the most versatile all-rounder in the Vaillant combi lineup and covers the majority of UK home sizes effectively.
Does Vaillant offer a system boiler?
Yes, Vaillant produces a full range of system boilers including the ecoFIT Pure System, the ecoTEC Plus System, and the premium ecoTEC 627 Exclusive Green iQ.
System boilers work alongside an external hot water cylinder to deliver heated water at mains pressure to multiple outlets simultaneously, making them well suited to larger homes with two or more bathrooms. Prices range from around £950 for the entry-level 12kW ecoTEC Plus System up to £1,540 for the 37kW version.
How long is the warranty on a Vaillant boiler?
Vaillant boilers come with a standard warranty of between 2 and 5 years depending on the model, with extensions of up to 10 years available when the boiler is installed by a Vaillant advanced installer.
Annual servicing by a qualified engineer is required throughout the warranty period to keep cover valid, and records of each service should be retained as evidence.
Are Vaillant boilers expensive compared to other brands?
Vaillant sits in the high mid-range of the UK boiler market. It’s generally more expensive than entry-level brands but competitive with other premium manufacturers such as Viessmann and Worcester Bosch.
On a like-for-like output comparison, Vaillant units tend to cost more than comparable Viessmann models, though both offer strong long-term reliability and A-rated efficiency. If system boilers are more your focus, our Vaillant system boiler performance ratings guide breaks down pricing and performance across that side of the range in more detail.
What is the most efficient Vaillant boiler?
The Vaillant ecoTEC Green iQ range represents the highest efficiency tier in the Vaillant lineup, using intelligent management technology to optimise consumption and output continuously throughout operation.
The ecoTEC Plus system and combi boilers also achieve up to 94% efficiency and carry an A ErP rating across all output sizes.
Do Vaillant boilers work with smart thermostats?
Yes, Vaillant boilers are compatible with the Vaillant vSMART app-based heating control system, which allows full remote management of the heating system from a smartphone or tablet.
The vSMART system is available across the ecoTEC range and provides scheduling, temperature adjustment and usage monitoring from any location. Vaillant boilers are also compatible with third-party smart thermostats including Nest and Hive.
Is Vaillant or Viessmann better value for money?
Viessmann boilers are generally less expensive than comparable Vaillant models at similar output levels. Viessmann also offers a dedicated 10-year guarantee on its stainless steel heat exchanger, which provides a level of component-specific protection that Vaillant does not match on a like-for-like model.
Both brands are excellent long-term investments. For most UK homeowners, Viessmann tends to represent the stronger overall value once price, efficiency and warranty coverage are considered together.
Are Vaillant boilers eligible for the Boiler Upgrade Scheme?
No. The Boiler Upgrade Scheme only funds heat pumps and, in some rural cases, biomass boilers. None of the gas combi, system or regular boilers in this guide qualify.
If you’re specifically after grant funding, you’d need to look at Vaillant’s heat pump range instead, which is a separate product line and a separate decision from the boilers covered here.
How long does a Vaillant boiler last?
A well-installed Vaillant boiler should last 10 to 15 years with annual servicing by a Gas Safe registered engineer, in line with most modern condensing boilers.
Sticking to the manufacturer’s service schedule is also usually a condition of the extended warranty, so it’s worth booking that visit every year without fail.
Verdict
Vaillant boilers occupy a well-earned position at the premium end of the UK market, with a product range that covers every home type and heating requirement, from compact flat installations through to large family homes with high simultaneous hot water demand.
The combination of A-rated efficiency, reliable build quality, and warranty cover of up to 10 years makes the investment a sound one once long-term running costs and lifespan are factored in.
For homeowners comparing Vaillant against other premium brands, the key considerations are the requirement for a Vaillant advanced installer to access the full warranty, and the higher unit prices compared to Viessmann equivalents at similar output levels.
Both factors are worth weighing carefully. For homeowners who prioritise brand heritage, smart control integration, and access to one of the widest installer networks in the UK, Vaillant remains a compelling and well-supported choice in 2026.
