Vaillant ecoTEC Plus Combi Boiler Cost with Installation

The Vaillant ecoTec plus combi is available in four output sizes: 26kW, 32kW, 36kW and 40kW. There is also a storage combi model (the 940), which has integrated water storage and can deliver a higher hot water supply to multiple outlets.

This wide range of choices makes the ecoTec plus a suitable option for small and large homes, whether you have just one bathroom or multiple. 

Take a closer look at the specifications of this model below. 

Vaillant EcoTec Plus Product Table
	Available outputs	26kW	32kW	36kW	40kW	40kW
	Model name	826	832	836	840	940
	Type	Combi	Combi	Combi	Combi	Storage Combi
	Fuel	Gas	Gas	Gas	Gas	Gas
	Condensing	Yes	Yes	Yes	Yes	Yes
	Efficiency Rating (%)	93	94	94	94	94
	ErP	A	A	A	A	A
	LPG Compatible	Yes	Yes	Yes	No	No
	Standard Warranty	5 years*
	Max Output (kW)	26.5	32	36.7	40.8	40.8
	Flow Rate (l/min)	10.6	13.0	14.6	16.3	18.0
	Mounting	Wall mounted
	Dimensions (mm)	720 x 440 x 352	720 x 440 x 352	720 x 440 x 352	720 x 440 x 386	720 x 440 x 580
	Typical Price (inc VAT)	£1,269 – £2,397
	Typical Installation Cost (inc VAT)	£1,200
	Total Cost	£2,469 – £3,597

*Terms and conditions apply. 

Vaillant ecoTec plus overview

The Vaillant ecoTec plus combi is a feature-packed boiler that is highly acclaimed for its efficiency, performance and design. Vaillant is renowned for innovation and has continuously improved this particular model to bring an enhanced option to the UK market.

Its first standout feature is the wide range of output sizes available, making it something that all homeowners can consider. See more about each model’s suitability below.

Vaillant ecoTec Plus Combi Range
Model output size	House size	Bathrooms	Radiators
26kW	Flats, small homes 1 to 3 bedrooms	1	Up to 10
32kW	Medium homes 3 to 4 bedrooms	1 – 2	Up to 15
36kW	Medium to large homes3 to 4+ bedrooms	1 – 2	Up to 20
40kW	Large homes 4 – 5 bedrooms	2	Up to 20
40kW (storage combi)	Large homes 4 – 5+ bedrooms	2 – 3	20+

The Vaillant ecoTec plus combi is made to be suitable for homes with as few as one bathroom, or for those with 2 or more. With 4 output ranges and a storage combi option, there’s a perfect match available for different levels of hot water demands.

As well as this impressive range, each model also comes with high energy efficiency levels, meaning users can save on energy bills and lower the overall environmental impact. There are, however, many benefits and features to enjoy with this boiler model. 

Key Benefits at a Glance

• Up to 94% energy efficiency (ErP A-rated)
• Quiet Mark accredited for low noise operation (45 – 47 dB)
• Stainless steel heat exchanger extends lifespan 
• Smart compatibility with vSmart, Hive and Nest controls
• Excellent warranty options with 5 years standard, extendable up to 10 years
• Compact design for easy installation
• Future-proof and ready for a 20% hydrogen gas blend

Vaillant ecoTec plus combi technical specifications

The Vaillant ecoTec plus combi is designed to be a reliable, advanced and accessible boiler option for most homes. Its durable design features, quiet operation and smart capabilities make it a great choice.

Let’s take a more in-depth look at some of the technical features that make this boiler one of the best on the market.

Output and efficiency

As we’ve seen, the ecoTec plus combi is available in a range of output sizes, with efficiency levels of up to 94%. This makes the ecoTec plus one of the most versatile combi boilers on the market, as it can be used for both small and larger properties.

With such high efficiency and an ErP rating of ‘A’, you can also enjoy the fact that this boiler is made to reduce energy waste. You’ll see direct savings on your energy bills with this boiler, particularly if you upgrade from an old, inefficient boiler.

Dimensions

Most of the models in this range come in a compact size, at just 720mm in height, 440mm in width, and 352mm in depth (26kW, 32kW and 36kW). 

The 40kW option is slightly larger, with a depth of 386mm, while the 40kW storage combi is the largest with a depth of 580mm (due to the in-built hot water storage tanks). 

Whilst this isn’t the smallest boiler on the market, it’s still very compact for the power and performance offered, meaning you can install it in a kitchen cupboard, for example.

Components included

When you purchase the Vaillant ecoTec plus combi, there is a range of great features and components included as standard. For example, the stainless steel heat exchanger improves the reliability and longevity of the boiler, as it’s resistant to corrosion.

Integrated technology, such as vSMART, enables you to control your boiler via an app or compatible thermostats, such as the Nest or Hive brands. This extra level of control gives you flexibility over how and when you heat your home, helping you to reduce energy waste and save on bills.

This boiler also includes a unique IoniDetect sensor, which allows the boiler to self-optimise its gas consumption. This also ensures the boiler performs optimally, increases efficiency and reduces wear and tear. 

The detector also contributes to a quieter operation, although paired with sound-absorbing padding fitted internally, the Vaillant ecoTec plus combi has become an award-winning Quiet Mark accredited appliance.

Prices and installation costs

The Vaillant ecoTec plus combi costs between £1,269 and £2,397, with prices varying based on the output size. Installation costs can add up to £1,200 to this figure, however, and will also depend on the complexity of your boiler replacement. 

These prices are only indicative, based on our research and actual boiler prices submitted to WhatPrice by homeowners.

To get an accurate price based on your needs, you should request quotes from at least 3 Gas Safe registered installers. They can advise you on the best boiler type for your home and give you tailored estimates to compare. 

Alternatively, you can use the WhatPrice Boiler Cost Calculator to get a guide price for your installation. 

Warranty and support

Vaillant offers a 5-year standard warranty for the ecoTec plus combi. While this may not seem like a long offer, there are ways to extend the warranty up to 10 years if you use a Vaillant Advance installer or add a Boiler Protection Kit. 

The standard warranty covers parts and labour, including repairs and replacement components due to manufacturing defects or failures. The warranty only covers the boiler unit, so it will not include additional items such as thermostats. 

By law, all gas boiler installations and servicing must be carried out by a Gas Safe registered engineer. To maintain the validity of your warranty, an annual service may also be a requirement.  

To ensure your warranty is active, you need to register your ecoTec plus combi boiler within 30 days of installation. Your installer can do this on the day of fitting, or you can visit the Vaillant website or myVAILLANT Web portal to register the boiler yourself. 

You will also need proof of installation and a complete commissioning Benchmark logbook, both of which your installer can provide. 

If you wish to extend your warranty by 7 years, you must have the boiler installed by a Vaillant Advance installer. If you want to extend to 10 years, you also need to ensure a Vaillant Boiler Protection Kit and filter are installed at the same time.

Should you need to make a claim, Vaillant has a UK-based customer service team that you can reach online or by phone.

Installation information

Choosing a new boiler replacement can feel like a daunting process, so it’s good to understand exactly what you can expect from a boiler installation. If you choose the Vaillant ecoTec plus combi, your installation fees can be up to £1,200. However, each home is unique, and the complexity of your existing heating system can affect this figure.

What to expect on installation day

To give you an idea of what a boiler installation entails, we’ve outlined the key steps in the process below: 

1. Preparation and checks
   Your engineer will assess the location for the new boiler and confirm that all necessary pipework and connections are ready. They will then assess how to remove the old boiler and whether any parts need to be replaced.
2. Removing the old boiler
   The existing boiler will be safely disconnected from the gas, electricity and water supply, as well as the flue pipe, and removed. If you’re switching from a system or regular boiler to a combi, any water tanks or cylinders will also be removed and disposed of.
3. Installing the new boiler
   If the boiler is being fitted in the same spot as the old one, the engineer will start installing the new combi unit. This involves mounting the boiler, connecting the electricity, water and gas supply and fitting the flue.
   If the boiler is being relocated, further preparation may be needed first to reroute pipework and electrical connections.
4. Configuration and controls
   The engineer will complete the electrical wiring and set up any controls, such as thermostats. They’ll then fill and pressurise the system and check that the radiators and pipework are functioning properly with no leaks.
5. Switch on and hand over
   To finish, the installer will switch on the system and confirm it’s operating safely. They’ll show you how everything works and complete any required documentation, including registering the installation to activate your warranty.

In some situations, additional work may be needed, especially if you’re changing your boiler type or upgrading your pipework. Your installer should explain any extra steps in advance so you know what to expect, any additional costs you may face, and how long it’s likely to take.

Do you need a system flush or filter?

Your installer may suggest a system flush (power flush) or a filter for your heating system. These are optional, however, they are both highly recommended to keep your new boiler and central heating running cleanly and efficiently. 

A system flush is typically carried out before the new boiler is installed. It clears out any sludge or debris left behind in your existing pipework, helping to prevent blockages and protecting the new boiler’s heat exchanger.

A filter helps prolong the life of your heating system by trapping debris before it enters the boiler, stopping it from circulating and causing damage.

While both options are a great way to protect and prolong the life of your new boiler, it’s worth noting that they will incur an additional cost. These costs can vary depending on the size of your home, with a system flush averaging between £350 and £800, and a filter between £65 and £300. 

Finding a Gas Safe registered engineer

In the UK, only Gas Safe registered engineers are legally permitted to install, repair or service gas boilers. Hiring a qualified professional guarantees the work meets safety regulations and is carried out to the correct standards.

When choosing an installer, it’s a good idea to get quotes from several Gas Safe registered engineers. This allows you to compare prices and confirm their credentials. You can check any engineer’s registration status on the official Gas Safe Register website.

Reviews and ratings

Vaillant is a leading heating brand in the UK and across Europe. The brand is widely recognised for its innovation and high-quality engineering. For example, Vaillant was the first to produce a wall-mounted boiler and a compact boiler, which helped shape the modern market. 

In terms of customer reviews, Vaillant has a good reputation, with an average of 4 out of 5 ratings on Trustpilot. Trade experts, Which? often rank Vaillant products as ‘Best Buys’ or within the top three models for many of their home heating rankings.  

As for the Vaillant ecoTec plus combi, reviews are generally very good, with a key focus being on the performance and efficiency of the boiler. However, there are reports or issues with some critical views on customer service.

Positive reviews

Most owners of the ecoTec plus combi note in reviews that this boiler is extremely reliable, lasting for years without any issues. Users also praise its high efficiency (up to 94% and ErP A-rated) and precise temperature control, leading to a noticeable reduction in energy bills. 

Reviews also comment on the Quiet Mark accreditation, claiming that the boiler operates with minimal noise, making it ideal for placement in a kitchen or utility room. There are also positive points for the vSMART app and compatibility with other smart thermostats, noting that advanced features like remote monitoring and control are a game-changer. 

There is good feedback on Vaillant’s customer service, from professional installers to smooth booking. Also, over 78% of Trustpilot reviews are 5-star, indicating a very positive overall satisfaction level.

Negative reviews

When looking at the more critical reviews, there are some reports of technical errors with this boiler. Mainly, these concern pressure drops or leaks that require frequent engineer visits. There are also some reports of persistent faults, however, these are rare.  

Customer service complaints centre mainly on response times for repairs or confusion over warranty conditions. Many comments mention frustration with warranty exclusions or engineer delays during busy seasons.

How the Vaillant ecoTec plus combi compares

Choosing a new boiler is a significant decision, so it’s worth comparing a few options. Below are three leading combi models that stack up well against the Vaillant ecoTec plus combi. By comparing their key features, you’ll get a clearer picture of what’s available and how each one measures up.

Vaillant ecoTec Plus Comparison Table
Make and model	Pros	Cons	Cost (excluding installation)
Vaillant ecoTec Plus Combi	5-year standard warranty (extendable to 10 years) 94% efficiency Wide range of outputs (26kW, 32kW, 36kW, 40kW) Quiet Mark accredited 4.6/5 on Trustpilot	Higher upfront cost than some other brands  Standard warranty is shorter than some other brands Larger in size than others (720mm x 440mm x 352mm)	£1,833
Worcester Bosch Greenstar 4000 Combi	7-year standard warranty (extendable to 10 years) 94% efficiency  Ultra-quiet Modern design Built-in Wifi (Bosch EasyControl) 4.6/5 on Trustpilot	Fewer output sizes (25kW, 30kW) Aluminium heat exchanger, not as efficient Some features are only available with premium controls	£1,200
Ideal Logic Max Combi2	10-year standard parts and labour warranty 94% energy efficiency (ErP A-rated) Compact size Includes system filter Built-in frost protection Competitive pricing Brand scores 4.8/5 on Trustpilot	Occasional issues with customer service Ideal engineers can be slow to respond  Not as quiet as other brands	£1,100
Viessmann Vitodens 100-W Combi	5-year standard warranty (extendable to 12 years) 94% efficiency Stainless steel heat exchanger (longer lasting) Compact Modern design	Higher upfront costs than other brands  Fewer UK engineers means longer wait times Parts are harder to source in the UK and can be more expensive	£1,915

Please note that our comparisons only cover some of the key features, and certain elements we haven’t covered may matter more to you than others. To get the best guidance on the right boiler for your needs, we suggest speaking with a Gas Safe registered engineer.

Final thoughts – is the Vaillant ecoTec plus combi right for you?

If you’re looking for a reliable, quiet and compact combi boiler, then the Vaillant ecoTec plus is a great choice. Its high energy efficiency and long-lasting components make it a boiler you can trust for years to come, which will reduce your energy consumption and help lower your bills.

Its Quiet Mark accreditation and positive customer reviews indicate just how user-friendly and compatible this model is. With output sizes from 26kW to 40kW, there’s a model suitable for homes of all sizes. If you have a particularly high hot water demand, there’s even a storage combi option.  

In terms of features, the ecoTec plus combi is compatible with smart controls, offering you more precise management of your heating to cut costs and reduce energy waste. With the option to extend your warranty from 5 to 10 years, you can also rest assured that you’re covered for the majority of your boiler’s lifespan. 

There are a few critical points to consider, though, in particular the high upfront cost. Compared to other combi models on the market, Vaillant’s offer can seem expensive. There are also strict warranty terms to follow, which some customers have found confusing, so this is worth keeping in mind. 

Some alternative combi boilers you could consider include the Worcester Bosch Greenstar 4000 Combi, the Ideal Logic Max Combi² and the Viessmann Vitodens 100-W Combi. Each is a leading market model, but they come in at varying costs with features worth comparing. 

Ultimately, the Vaillant ecoTec plus combi is a robust, efficient and adaptable solution for most homes. It offers hard-wearing tech and an extended warranty, making it a combi boiler you can rely on. To get expert advice on your new boiler, speak to a qualified engineer.

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