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. So keep reading to find out why Vaillant is one of the best boiler manufacturers in the industry.
New boiler
When buying a new or replacement boiler, it is 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!
It is important to remember that boiler installation prices can vary depending on the model and the kW output you choose. There are also other factors that may affect the cost, such as your current central heating system, installation costs, and additional extras.
Vaillant boiler reviews
With an average rating of 4.6 out of 5 on Trustpilot from over 14.5k reviews, it becomes obvious that Vaillant is a great boiler brand. They offer reliable and efficient boilers for an affordable price.
From looking at their reviews on Trustpilot, you know that you are dealing with a good company that cares about its customers.
Here are only a few of Vaillant’s Trustpilot reviews:
“New boiler better than expected. Good quality, reliable and recommend to everyone”
“Excellent customer service, professional service. Kept me well informed with progress thought the day. Gave lots of information on the boiler and how to maintain it. Job done quickly.”
In 2020’s Which? Best Boiler brand survey, Vaillant scored an overall 80% for the brand score category.
Which? asked over 7,500 boiler owners how satisfied they were with their boiler, if they experienced any faults or breakdowns and if they would recommend Vaillant boilers to their friends and family. Vaillant scored a total of 4 out of 5 stars for brand reliability and an amazing 5 out of 5 stars for brand-customer score rating. In addition to this, Which? also, asked 153 Which? Trusted Traders about the ease of installation and if parts and spares were easy to get hold of. Vaillant scored a 4 out of 5 for the engineer recommendation category. Another great score.
Which? Best Boiler brand 2020 survey results
Brand reliability rating | 4 stars |
Brand customer score rating | 5 stars |
Ease of fixing a common fault | 5 stars |
Ease of servicing | 5 stars |
Availability of parts and spares | 5 stars |
Engineer recommendation | 4 stars |
Build quality | 5 stars |
Here’s what Which? have to say about Vaillant boilers:
“Vaillant makes fantastic boilers that have a good reliability record, according to the results of our latest survey of boiler owners. It also 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 Which? brand score for Vaillant gas boilers is a brilliant 80%. Vaillant is the best gas boiler brand of any included in our survey in 2020. So it’s a great choice. The Which? score is based on reliability, owners’ satisfaction with their boiler, the likelihood of them recommending it to a friend, plus the detailed views of heating engineers on how easy Vaillant boilers are to repair and service, their build quality, how easy it is to get hold of parts and spares and whether they would recommend the brand to a customer.”
The History Behind Vaillant
Vaillant was formed way back in 1874 by Johann Vaillant in Remscheid, Germany. Johann Vaillant, the tenth child in his family, founded his own workshop as a copper beater and pump maker.
Many inventions have been credited to Vaillant over the years including modern-day central heating in 1924. Previously each room was heated individually by stoves or fireplaces until Vaillant introduced the central heating boiler that could heat multiple radiators simultaneously – revolutionising home heating.
The Vaillant boiler range has been given a Which? Best Buy award and they have also been awarded a Quiet Mark Accreditation, from the Noise Abatement Society for their quiet running boilers.
For a full timeline of the Vaillant, company history click here.
Vaillant offers a range of different boilers, including combination (combi) boilers, system boilers, and regular heat only boilers. When purchasing a new or replacement boiler, it is important that you choose the best boiler model for you.
But what’s the difference between them all?
Combi boilers tend to be the best option for most UK homes as they don’t require storage tanks and offer heating and hot water on demand. System boilers are usually found in households with more than one bathroom in use at the same time (high hot water demand). Regular boilers are useful for homes with low water pressure as they utilise a ‘gravity fed’ system but due to the tanks involved, most homes switch to a combi boiler when replacing a regular boiler.
These boiler systems are all known as ‘condensing boilers’. All homes in the UK are legally required to have condensing boilers fitted as they are substantially more energy-efficient than older forms of boilers. Condensing boilers make use of heat that would have escaped into the atmosphere with non-condensing boilers via a fitted heat exchanger. By utilising this heat for your home, condensing boilers are much more efficient, saving you money on your heating bills and lowering your carbon footprint, double bonus.
If you’re not sure what boiler type you have, we have a blog that covers this but don’t worry, we can break it down quickly for you below:
- Combi boilers don’t have any tanks, they heat water from the mains water supply
- System boilers have a hot water storage tank, usually in an airing cupboard
- Regular boilers have a hot water tank and a cold water storage tank (usually in the attic)
Vaillant Combi Boiler Prices
Firstly, we have given a brief description of a combi boiler above, however, here’s some more information to help you decide if a combi boiler is best for you.
What is a combi boiler?
Combi boilers or to give them their full title, combination boilers, are the most common type of boiler found and installed in the UK.
In fact, over half of all boiler installs in the UK are combi boilers. The name combination boiler comes from their ability to both heat your home and provide you with hot water.
Combi boilers are connected directly to the mains water supply coming into your home, they heat this water directly, removing the need for a separate water tank (as with a system or regular boiler). This saves a great deal of space, especially in flats and smaller homes where space is at a premium.
Unlike system and regular boilers, combi boilers heat water as and when you need it, meaning there is no wasted energy heating water that just sits in the tank.
Combi boilers are directly connected to the water mains and heat water directly from the supply coming into your house, meaning you don’t need a separate water storage tank as you would with a system boiler, saving space.
Another benefit of combi boilers is that they supply hot water at mains pressure, which allows you to enjoy mains pressure showers without needing to install a shower pump.
Combi boilers keep a small reservoir of pre-heated water within them to ensure they can supply hot water to taps instantly.
The benefits of a combi boiler
- Perfect for compact homes with limited space
- Remove the need for a storage tank and extensive pipework
- Cost-effective and easy to install as well as repair
- Provides a constant supply of hot water on demand
- Energy-efficient since it heats water only when needed
The cons of a combi boiler
- If you live in an area with poor water pressure, then your water flow may be sub-standard, this is not ideal for a combi boiler as they rely on your mains water pressure
- You can’t use power showers with combi boilers as they rely on hot and cold water feed from gravity-fed systems
- If your home has more than 2 bathrooms that are usually both used at the same time, a combi boiler may not be able to cope with such high demand for instant hot water
- Unlike system and regular boilers, there is no hot water tank for backup, meaning if you’re boiler breaks down you will be without hot water.
- Only advanced combi boilers are compatible with solar energy
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* |
This is probably a great time to mention that all WarmZilla boiler prices include Gas Safe installation as standard. It also includes a system filter, a system cleanse, guarantee, smart thermostat, and any other bits and bobs you need to get your boiler up and running.
As we always say, when buying a new or replacement boiler, it is important to consider all aspects, including whether or not installation is included in the price. Not all prices include boiler installation, make sure your quote does as you’ll be looking at £1000+ to get a boiler installed.
Now you know that all of this is included when purchasing with WarmZilla, you may as well save yourself time and find a new boiler the WarmZilla way – where your price is fixed, everything is included and our online survey will work out exactly what boiler you need based on your answers to some simple questions about your home.
Vaillant System Boiler Prices
Before we get into the Vaillant System boiler prices, let’s discuss what a system boiler is and how they work.
What is a system boiler?
System boilers can usually be found in homes that have a high requirement for hot water. In a system boiler, cold water enters the boiler directly from the mains supply. The water is heated via a heat exchanger, which transfers energy from the gas jets to the water. Once heated, the water is pumped to the hot water cylinder, where it is stored until required. This hot water is then available for use in multiple bathrooms should it be required. In practice, you can have two baths running in separate bathrooms and they will both get hot water without affecting the heating of your home.
The benefits of a system boiler
- Easy installation as components are built-in
- No storage cold water tank is needed, hence, space saver
- Meets high hot water demands without sacrificing water pressure
- Energy saver as well as compatible with green renewable sources of energy like solar thermal power
The cons of a system boiler
- An additional large hot water storage tank is required, not suitable for flats or smaller homes
- Loss of heat from the hot water storage tank, no matter how well insulated
- Hot water is limited to the capacity of the storage tank, once the hot water from the tank is used up you will have to wait for it to heat the water again. A combi boiler heats water straight from the mains so it will always be hot.
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 then get a boiler quote from WarmZilla. It only takes two minutes, you don’t need to have any technical knowledge, and it’s all done online. Easy.
Vaillant Regular Boiler Prices
What is a regular boiler?
Firstly, here’s an explanation of a regular (heat only) boiler and how they work.
Regular boiler systems, also known as conventional, traditional, heat-only, or open vent boilers, are the most difficult to install or replace. A regular boiler includes both a hot and cold water storage tank, the boiler itself, and an expansion cistern located next to the cold water tank. This takes up quite a bit of space in a home and it’s usually preferable to switch to a combi so that these tanks can be removed.
Regular boilers are becoming less and less common as they are replaced with more efficient boiler systems that don’t take up as much space and have fewer parts, meaning, there is less to potentially go wrong.
Most likely, you would only tend to keep a regular boiler system if you were concerned that your central heating system would struggle to cope with the increased water pressure from a system or combi boiler.
Similar to system boilers, regular boilers are able to supply large amounts of hot water simultaneously to multiple bathrooms due to the hot water storage tank facility.
The benefits of a regular boiler
- Allows use of hot water in multiple bathrooms simultaneously
- Doesn’t compromise on the water pressure
- Ideal for older properties looking to install a new boiler as they already have a similar pipe system in place
- Compatible with solar panels as well as heat pump based heating systems
The cons of a regular boiler
- The amount of space the boiler and tanks take up is impractical, particularly for smaller homes or flats
- Limited hot water up to the volume of your hot water storage tank
- Hot water tank loses heat, no matter how well insulated
- Difficult to install, only suitable as a replacement for another regular boiler system
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 then get a boiler quote from WarmZilla now.
If you’re not sure what boiler type you need for your home Don’t panic, we’ve got this covered.
Vaillant Boiler Maintenance & Service
Like every other heating output device, boilers also experience issues with time. The best practice to prolong your boiler’s life is to get it serviced annually by an experienced heating engineer. Regular servicing by a professional ensures your boiler performs at optimum levels without raising heating bills. It also helps to avoid any potential safety concerns that may arise.
There are also other ways to prolong your boiler’s life. These include bleeding your radiators, installing a magnetic filter, adding inhibitors, insulating your pipes and keeping your systems clean. If you would like more information on these, we have a blog discussing ‘7 ways to increase boiler lifespan’
Vaillant Boiler Safety
Over time boilers can pose safety threats if not maintained regularly. There could be carbon monoxide leaks that generally go undetected, earning it the term ‘silent killer’. It is a deadly, colourless and odourless gas formed when there is an insufficient supply of oxygen during combustion.
Faults in your boiler can facilitate carbon monoxide production that might leak into the house. Regular servicing makes sure your boiler is absolutely safe to use. Refer to our boiler fault codes blog for more information on possible faults with your boiler.
To read more about carbon monoxide and its dangers, click here.
Vaillant Boiler Warranty
Vaillant boilers come with a warranty but in order to keep them valid, you need to get your boiler examined by a certified Gas Safe engineer annually.
The standard warranty for Vaillant boilers is anywhere from 2 to 5 years. However, when purchasing your new Vaillant boiler with WarmZilla, the warranty is extended up to 10 years.
Vaillant Boiler Fault Codes
If you are interested in reading more about Vaillant Boiler Fault Codes, we have a blog designated to this. Our Vaillant boiler error code list is meant as a guide only to help you understand what the issue is and assess how much it would be likely to cost to fix it. It includes issues such as Vaillant boiler pressure and how to troubleshoot your Vaillant boiler.
Please note, that you should never attempt to fix an issue within your boiler if you aren’t a Gas Safe registered engineer.
*The WarmZilla Worcester Bosch 4000 Package includes an exclusive 12-year guarantee, 10 years provided by the manufacturer and 2 years provided by WarmZilla. More info is available on the WarmZilla T&C pages.
**Prices taken from a price comparison website. The prices shown are the estimated total cost, including installation and VAT.
