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In every home in London, the central heating system is vital for keeping us warm and providing hot water. That's why selecting a trustworthy boiler brand with energy-saving features to reduce utility expenses is important.

Vaillant has been making boilers for over 140 years, starting in Germany in 1874. Today, it's still a top family-owned business in Europe, focusing on making energy-efficient and effective boilers for heating homes.

What Is a Combi Boiler?

A Combi Boiler, or combination boiler, is a type of home boiler that does two jobs in one. It heats your home and provides hot water, all in a single unit.

Unlike older boilers, a combi boiler heats water straight from the mains whenever you need it. When you turn on a hot water tap, the combi boiler starts burning gas to heat the water. The hot gases then pass through pipes and a heat exchanger, quickly heating the cold water around it. This means you get hot water on demand without needing a separate water tank.

About Vaillant ecoFIT Pure 830


The Vaillant ecoFIT Pure 830 combi gas boiler is ideal for small to medium-sized properties with up to 15 radiators.

This boiler is powered by gas and boasts a combi/condensing design. It offers a central heating (CH) output of 26.5kW and a domestic hot water (DHW) output of 30.0kW.

It features a high-quality aluminium heat exchanger for durability and the option to fit a rear flue. Plus, it operates ultra-quietly, making it a reliable and efficient choice for heating your home.

[Explained By Serviceteam Experts]

Key Features of Vaillant ecoFIT Pure 830

Flow Rate & Output

The Vaillant ecoFit Pure 830 Combi Boiler can produce a good amount of hot water, pumping out over 8 litres per minute straight into your taps. It's perfect for bigger homes with more than one bathroom and a high demand for hot water.

With the Vaillant ecoFIT Pure 830 boiler, you can easily run 1 bath and 2 showers at the same time and still get excellent water pressure.

Controlling the Vaillant ecoFit Pure 830 Combi Boiler is simple. It has a basic control panel that offers both manual and smart control options. By pairing it with smart thermostats, you can manage your hot water from your smartphone. This means you can schedule your heating, keep an eye on your energy use, and even turn your heating on or off when you're not home. The smart features make this boiler an ideal choice for any home.

Size A-Vaillant-ecoFIT-Pure-830-boiler-in-a-London-home

The Vaillant ecoFit Pure 830 Combi Boiler is compact, measuring just 720mm x 440mm x 33mm. This makes it perfect for homes with medium-sized storage and installation spaces. Because it doesn't need a storage tank or hot water cylinder, it's a sleek and streamlined option that fits neatly into any space. If you need an even smaller boiler, Vaillant offers other models to save you even more space.

“ecoFIT Pure 830 gas combi boiler is a cupboard-size boiler for any home.”

Energy Efficiency

This boiler is not only powerful but also highly efficient, with an impressive Energy-related Products (ErP) rating of 89.3%, which is A-grade efficiency. This means it can help you save money on your energy bills while reducing carbon emissions. Vaillant boilers are known for their high performance, making them a smart choice for any home.


Most Vaillant boiler models come with a standard five-year warranty, which can be extended to 7 to 10 years if your Vaillant ecoFit Pure 830 Combi Boiler is installed by a Vaillant-accredited installer. This gives you peace of mind, knowing that your boiler is covered for years.

For expert Vaillant boiler installation in London, contact Serviceteam's skilled installers.

Why Is Vaillant ecoFIT A Good Boiler?

It Is an Energy Efficient Boiler

The ecoFIT pure has the highest energy efficiency rating, an 'A,' which means it's really good at saving energy. It's 94% efficient at heating your home and providing hot water. Due to its reduced energy consumption, this not only lowers your energy costs but also benefits the environment.

It Provides Quick Hot Water Supply

The ecoFIT pure boiler delivers hot water faster than many other boilers, which is great for homes of all sizes. This means you can count on always having enough hot water, even when lots of people are using it at the same time.


The load compensation feature of the boiler means that it can change how much heat it produces depending on how much heat your home needs. This helps to save energy because the boiler doesn't produce more heat than necessary, which would waste energy. So, when your home needs less heat, the boiler doesn't work as hard, which saves energy and reduces your bills.

It Is Simple to Use

The Vaillant ecoFIT pure is a type of boiler that can be attached to a wall in your home. It's really good at saving energy and works well for many different houses. This boiler comes with a regular control panel and a small screen, so it's simple to use.

It’s Installation Process Is Easy

The small size of the boiler makes it possible to install it either on a wall or inside most regular cupboards, including those used for airing clothes.

It Has Smart Control

The ecoFIT pure boiler is fully compatible with smart technology, including Vaillant's vSMART™ app.


Vaillant vSMARTTM features about heating and hot water information.
Image from professional.vaillant.co.uk

With this app, you gain remote control over your boiler, enabling temperature adjustments, schedule settings, and real-time energy monitoring from any location. This convenient feature offers flexibility and ease in managing your heating system.

What Is The Heating Power Of A Vaillant ecoFIT Pure 830 Combi Gas Boiler?

The Vaillant ecoFIT Pure 830 can produce 26.5kW of heat for your home's central heating and 30kW of hot water. This makes it a good choice for homes with about 15 radiators and 1-2 bathrooms.

If you need something different, Vaillant also offers the Pure 825 and Pure 835 boilers. The Pure 825 is a better choice if you don't need as much heating or hot water, while the Pure 835 is great for homes with higher demands.

What's the Size of the Vaillant ecoFIT Pure 830?

The Vaillant ecoFIT Pure 830 measures 700x390x295mm (Height x Width x Depth) and weighs 35kg. It's made to fit snugly inside a kitchen cupboard for compact installation.

What Is The Warranty Period For The Vaillant ecoFIT Pure 830 Combi Gas Boiler Offer?


The standard warranty for the Vaillant ecoFIT Pure 830 is 2 years. However, for added peace of mind, you have the option to extend the warranty to either 7 or 10 years when your Vaillant boiler is installed by a Vaillant Advance installer.

The standard warranty for the Vaillant ecoFIT Pure 830 is 2 years. However, for added peace of mind, you have the option to extend the warranty to either 7 or 10 years when your Vaillant boiler is installed.

What Is The Cost Of The Vaillant ecoFIT Pure 830 Combi Gas Boiler?

It is ranging from £1,949 to £2,449. This price breakdown includes the boiler itself, priced at £1,149, additional sundries like filters and flue costing around £300, and installation fees ranging from £500 to £1,000.

These installation costs are estimates, though, and they could change based on things like the location, complexity of the installation, and your existing heating system. Consult a professional boiler engineer for a personalised quote tailored to your needs.

What's The Difference Between The Vaillant ecoFIT Pure 830 And The ecoTEC Plus 832?

The main difference between the Vaillant ecoFIT Pure 830 and the ecoTEC Plus 832 is their quality and additional features. While both boilers are highly energy efficient and can support properties with up to 15 radiators, the Plus 832 is considered a higher quality option, albeit at a higher price.

Here's a breakdown of the differences:

  • Warranty
    The ecoTEC Plus 832 comes with a longer warranty period compared to the ecoFIT Pure 830.
  • Filling Loop
    The Plus 832 has a built-in filling loop, making it easier to top up the boiler's water pressure.
  • Domestic Hot Water Outputs
    The Plus model offers a wider range of domestic hot water outputs, providing more flexibility to meet different hot water demands.
  • Controls
    The ecoTEC Plus 832 features a flap cover over the controls, giving it a sleeker appearance, while the ecoFIT Pure 830 has exposed controls.

Overall, while both boilers are efficient and suitable for most homes, the ecoTEC Plus 832 offers additional features and a longer warranty for those willing to invest in a higher-quality option.

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Which Vaillant ecoFIT Pure Combi Boiler Is The Most Powerful?

The ecoFIT Pure range has three combi boilers: the 825, 830, and 835. The ecoFIT Pure 830 model is in the middle. If your home has lower heating and hot water demands, the 825 is a good choice. However, the ecoFIT Pure 835 is better suited for larger homes with higher demands.

Is It Time To Upgrade Your Boiler?


Beyond a complete breakdown, there are several signs to watch for that could indicate your boiler is nearing the end of its lifespan.

Leaks, regardless of size, should be addressed promptly to prevent potential major issues. Even minor leaks can escalate quickly and cause significant damage if not fixed promptly.

Repeated error codes, particularly those leading to a boiler shutdown for safety reasons, are cause for concern and may signal underlying heating issues. To learn more about boiler error codes, visit our blog dedicated to boiler errors.

Frequent maintenance requirements or consistently subpar performance could point to significant component issues that may warrant consideration for an upgrade.

Serviceteam Professional Boiler Installers

We provide affordable rates for new boiler installations and property maintenance services throughout London. With over 37 years of experience installing boilers, our skilled engineers are equipped to handle your boiler installation project with precision and care.

serviceteam-londonis a trusted installer for Vaillant boilers in London, accredited by the manufacturer.

We take pride in our high customer satisfaction rate, boasting a 90% customer retention rate. With over 3,000 positive reviews on platforms like Checkatrade, Trustpilot, and Which? Trusted Trader, you can trust us for reliable service. Our expertise extends to installing gas, combi, smart, and electric boilers, ensuring we meet all your heating needs.