5 Best Vaillant ecoFIT Pure System Boiler Compare Prices & Amazing Reviews With Buyers Guide

With the onset of the winter season, you have to make certain smart choices regarding the brand of clothes you would prefer for winter likewise when it comes to choosing a boiler you need to make a smart choice as well because your choice of boiler would affect your electricity bills.

Boilers are available in different types, System, Combi and regular boilers. 

System Boilers is suitable for homes with multiple bathrooms. System Boilers work in a closed system as the boiler only needs a cylinder, they take the water supply directly from the mains There is no need for a tank in the Loft. A system boiler is easy to install. It is beneficial for homes that have a high demand for the heated water.

The Vaillant ecoFIT Pure System Boilers has a SEDBUK efficiency rating of up to 89.3% and is A-rated for both heating and hot water efficiency. These system boilers are suitable for homes with multiple bathrooms having running tap water at the same time.

NameOur RatingAvailabilityPriceGlobal ratings
VAILLANT ECOFIT PURE SYSTEM BOILERS8.9/10Yes£844.24 – £1157.394.7 out 5 stars, 1024 reviews

The Vaillant ecoFIT Pure System Boiler

The Vaillant ecoFIT Pure System Boilers range from £ 884.24 – £ 1,157.39 including VAT and excluding Installation charges. The boiler is available in different outputs of 12kW, 15kW, 18kW, 25kW and 30kW. The higher heating output options are designed for homes where heating and hot water demand is greater.  The Vaillant ecoFIT Pure System Boiler has a modulation range of 1:5 so that the boiler will use only 15% power when heating is not needed. This boiler is Quite Mark Approved. The ecoFIT Pure System is also compatible with uniSTOR cylinders that are designed to minimise heat loss and reduce running costs.

There is a clear LED Display which is 100% visible in poor light conditions. It also features built-in two-stage frost protection to ensure the boiler can always perform to the best of its ability throughout the year.

Various Models of Vaillant ecoFIT Pure System Boilers.

ModelTypeDimensionsMax flow rateOutputEfficiencyTypical Price
VAILLANT ECOFIT PURE 612SystemH – 700 MM W – 390 MM D – 295 MMN/A12 kW100% A-rated£ 844.24
VAILLANT ECOFIT PURE 615SystemH – 700 MM W – 390 MM D – 295 MMN/A15 kW100% A-rated£901.66
VAILLANT ECOFIT PURE 618SystemH – 700 MM W – 390 MM D – 295 MMN/A18 kW100% A-rated£926.40
VAILLANT ECOFIT PURE 625SystemH – 700 MM W – 390 MM D – 295 MMN/A25 kW100% A-rated£1,115.90
VAILLANT ECOFIT PURE 630SystemH – 700 MM W – 390 MM D – 295 MMN/A30 kW100% A-rated£1,157.39


1.Vaillant ecoFIT Pure System Boilers can provide a constant supply of hot water to taps, even when they are all running at the same time.

2.The Vaillant ecoFIT Pure System Boilers are suitable for homes with multiple bathrooms.

3.Another benefit of these system boilers is that they are needless of any tanks in the loft.

4.The Vaillant ecoFIT Pure System Boilers are available in different outputs which will help you to determine the right size for your property.

5. This appliance also offers user control that includes a reset button, pressure gauge, heating and hot water temperature switches.

6.The price of the boiler and the installation cost is reasonable.

7.It can fit into your kitchen cupboard.

8.It has top and rear flue options – flexible siting possibilities.

9.The Vaillant ecoFIT Pure System Boilers provides maximum efficiency Angels to reduce your fuel bills and carbon emissions.

10. The boiler is also compatible with solar thermals.

11.This appliance is compatible with vSMART app-based heating control which enables you to monitor and control your heating and hot water anytime and anywhere.

12.The boiler is Quiet Mark approved, which means it’s one of the quietest systems available and can be sited even in the busiest of rooms.

13.The System boiler offers Built-in two-stage Frost Protection.


1. The Vaillant ecofit system boiler offers a warranty of 2 years, a longer warranty will be preferable.

2. The boiler requires a separate cylinder.


A-rated BoilerThis appliance will save Money on your Gas Bills
Boiler Modulation range of up to 1:5Maximises efficiency and helps lower energy consumption
Built-in two stages Frost protectionOptimal performance regardless of the weather.
Clear LED DisplayDelivers visibility in poor light conditions
Patented Stainless steel heat exchangerHighly efficient performance
Quiet Mark ApprovedUltra Quiet while in operation
2-year parts and Labour warrantyConfidence and peace of mind
Free 7-year Warranty Upgrade When Installed by a Vaillant Advance InstallerExtra peace of mind with no extra cost

Product Specifications

ModelVaillant ecoFIT System Boiler
Typical Price£844.24 to £1,157.39
Efficiency RatingA-rated, 100%
ERP rating94%
Outputs12kW 15kW 18kW 25kW 30kW
Modulation range1:5
Warranty2 years

Buying Guide For Vaillant ecoFIT Pure System Boiler

System boilers are suitable for homes with multiple bathrooms. System boilers can be a good replacement for heat only boilers and work with Standard cylinders or Combi boilers where you need better hot water performance.

While choosing a suitable system boiler for your home, you will take into consideration the size of your property and your budget.

The average UK homes need 6kW to 8 kW of heat at peak time, the smallest heat only boiler available is 12kW.

If you have a home with multiple bathrooms in use at a time this system boiler would be a smart choice. System boilers require good incoming water pressure and good internal flow rate to operate at their capacity. System Boilers provide good hot water flow rate. For those who are looking for a new boiler, a system boiler would be preferable and the Purchase will be worth when you are extending or adding bathrooms in your home.

Here are some of the factors which you should take into consideration by choosing a system boiler:

1.Whether the Boiler is Condensing or Non-Condensing-

condensing boilers help to reduce carbon emissions providing higher efficiency thus help to reduce energy bills. A condensing boiler uses fuel gas at a lower temperature to preheat incoming water enabling the heater to achieve 99% efficiency. Condensing boilers are safer for your home because these boilers are sealed to increase insulation and it captures air from outside this means that the boiler will not suck anything.

2.Boiler Reliability-

boiler reliability is something which is the primary concern for the customer’s reliability means the number of functional areas the boiler would offer without the need for repair. While buying a boiler you should look for its brand and warranty period offered by the brand.

3.Boiler Type-

Boilers are available in three different types. Before choosing a suitable boiler for your home you should first look for the different types of boilers, their efficiencies, and their suitability for your home. Boilers are of three different types, Combi boilers, system boilers, and heat only boilers.

Combi boilers-

Combi boilers are suitable for small homes with a single bathroom. Combi boilers do not require a separate tank for storage. Combi boilers heat the water directly from the mains.

Heat-only Boilers– heat only boiler is also referred to as a conventional boiler. This boiler requires a cylinder of hot water tank for storage. This is suitable for homes having more than two occupants.

System boilers- system boilers are suitable for homes that have less space. These are easy to install boilers that require a cylinder for storing hot water. The major heating and hot water system components are built in the boiler itself. This appliance does not need a tank in the Loft. It is easy to install the boiler.

4.Boiler Efficiency- Gas condensing boilers offer more efficiency thus helping you save your energy bills. Gas condensing boilers use less amount of resources.

5.Boiler Size – When it comes to boiler size you must consider two areas first, the boiler size according to the size of your home, second, the boiler’s heating capacity. Since each house comes in different sizes and number of bathrooms the boiler size is a unique factor in this case.

6.Repair and maintenance cost per year– you must also take into consideration the cost of repairs and maintenance for the boiler you must also look for the aftercare service provided by the brand.

7. Consider an Engineer’s opinion– An engineer’s opinion is valuable for choosing a suitable boiler for your home. The engineers have a better idea of the different sizes and efficiency of boilers they know about the various brands in the market with different outputs available hence they will help you choose a suitable boiler for your home which will be value for money and will provide you with the best performance and Energy Efficiency.

What Does The Expert Have To Say?

Despite the boiler is a very significant part of every British household, it is common that many homeowners do not know much information about the boiler beyond simply setting the thermostat. Anything ahead of this such as a breakdown, most people tend to take the back seat and let the experts come and fix the issue. This means that the majority of us would be clueless about the differences between boilers when it comes to selecting the most appropriate one for our property.

Choosing the correct heating system that has a high-efficiency rate can cause drastic changes to your energy bill each year and this is why knowing your options pays off! There 3 main different types of boilers which are combination boilers, system boilers and heat only boilers. This blog will talk about these different appliances to help you choose the right boiler for your home.

The system boilers are mainly suitable for a large household as they provide hot water and central heating through a hot water storage cylinder that is located in your home. With this type of heating, you will need room to accommodate the boiler and a separate airing cupboard for the hot water storage cylinder. The system boiler provides incredibly large amounts of hot water however when the water in the cylinder runs out you will have to wait for more water to reheat. On the brighter side, system boilers allow you to operate more than two showers easily making them suitable for larger families.

Written By Martin

On 01/05/2014


1.How efficient is the Vaillant ecoFIT Pure 625 System Boiler?

The Vaillant ecoFIT Pure 625 System Boiler is very efficient. It has an efficiency of 94% and is ErP A-rated. This boiler will help to lower your energy bills.

2. Which output rating would be suitable for my home?

A central heating output rating of 25.4 kW means that this boiler is best suited to properties with around 15 radiators.

3. Is a system boiler suitable for small homes?

For system boilers, you will also need space for the installation of a hot water cylinder. System boilers are suitable for homes with multiple bathrooms which require hot water running tap at the same time.

4.How long is the warranty period of the Vaillant ecoFIT System Boiler?

The Vaillant ecoFIT Pure System Boilers offer a warranty period of 2 years. The warranty period could be extended up to 7 years if the Installation is carried out by Vaillant Advance Installer.

5.What is the life expectancy of a Vaillant Boiler?

The Vaillant boilers have a life expectancy of up to 15 years. If serviced regularly and maintained these boilers are highly efficient and will have life expectancy for a very long duration.

6.Are Vaillant Boilers reliable?

The Vaillant holds a renowned position within the industry for over 140 years. They have been serving and providing reliable and energy-efficient heating solutions to homeowners.

7.How Will, I know that my Vaillant ecoFIT Pure System Boiler needs a replacement?

If your Vaillant Boiler falls short of pressure, the F22 error code will appear on the digital display. All boilers tend to lose pressure with time and usage but if there is a sudden drop in the pressure this indicates that your boiler needs a repair.

8.What are the different outputs available for Vaillant ecoFIT Pure System Boilers?

The outputs available for Vaillant ecoFIT Pure System Boilers are 12kW, 15kW, 18kW,  25kW and 30kW.

9.What is the Lowest Price range for Vaillant ecoFIT Pure System Boilers?

The lowest price for Vaillant ecoFIT Pure System Boiler is £ 844.24.


  • Name of the Reviewer – Sandra Blackwell
  • Date of Review – 20th December 2020
  • Rating – 5 out of 5 stars
  • Feedback – Bought this boiler today, very happy and satisfied with its service. The Engineer explained everything very well and it was so easy and quick to install.
  • Name of the Reviewer – Steve Thornton
  • Date of Review – 20th December 2020
  • Rating – 5 out of 5 stars
  • Feedback– Great Boiler and Excellent Service.
  • Name of the Reviewer – Anne
  • Date of Review – 20th December 2020
  • Rating – 5 out of 5 stars
  • Feedback– Would recommend it to family and friends.

This was recommended by the plumber. So pleased with it, doing a great job and very quiet.

  • Name of the Reviewer – A Masterson
  • Date of Review – 20th December 2020
  • Rating – 5 out of 5 stars
  • Feedback- Great service very helpful, clean and tidy would recommend.
  • Name of the Reviewer – Brin
  • Date of Review – 20th December 2020
  • Rating – 4.9 out of 5 stars
  • Feedback-  I should have changed to Vaillant years ago. Excellent boiler with excellent service.
  • Name of the Reviewer – Joanne
  • Date of Review – 16th December 2020
  • Rating – 5 out of 5 stars
  • Feedback- I had a Vaillant boiler fitted with Heat Leaders. Yugi came and fitted it. I am very happy with the boiler’s performance and the fitting and customer service were excellent. Really pleased I would highly recommend it.

Stories From Real World Use Cases

  • Name of the Reviewer – Stuart Gosney
  • Date of Review – 18th December 2020
  • Rating – 5 out of 5 stars
  • Feedback– This is the number one boiler for me without any doubt.

Details – A very efficient boiler with the ability to set controls etc for Heating, Water temperature & pressure. Also has a separate temperature & pressure controller that can be twinned vi WI-FI signal to the boiler controller. This controller can be placed/used anywhere in the home.

Delighted with additions in the plumbing for Metallic cleaning of mains water, ability to sort out high Limescale.

Overall a fantastic boiler & worth every penny.

Would definitely recommend this boiler to anyone.

Thank you.

Did You Know?

  1. Here are certain fun facts about boilers :
  2. Boilers are environmentally friendly.
  3. Boilers have high energy efficiency and they can be up to 90% energy efficient. Boilers do not require frequent changing of the air filters since they don’t blow air they work silently without needing a fan
  4. Boilers save money.
  5. Boilers help reduce your energy bills.
  6. Good pressure corresponds to good heating.
  7. The weaker water pressure would indicate that there is some problem or a leakage in the water heater.
  8. Boilers don’t add humidity.
  9. Boilers do not affect the dryness or moisture of the air.
  10. Boilers do not boil water.
  11. Boilers got their name because they generate steam.


With the advent of the winter, you often have to prepare a few things for various purposes be it domestic, personal or professional. However, along with buying stuff for winter starting from your care to your heating appliances, you must make a smart choice which is great value for money.

The Vaillant ecoFIT Pure System Boilers are best suited for homes with multiple bathrooms in use. These boilers are available in different outputs according to the heat requirements. This appliance offers a warranty of 2 years which could be extended upto 7 years. The Appliance is Quite Mark Approved. This is an A-rated boiler which will provide higher efficiency and reduced energy bills.

Add a Comment

Your email address will not be published. Required fields are marked *