Vaillant ecoTEC Exclusive Combi Boiler with Green IQ Review & Prices

vaillant ecotec combi boiler review logo

Vaillant ecoTEC Exclusive combi review – How good is it?

We have reviewed the Vaillant ecoTEC Exclusive combi boiler range, which is an award-winning range of powerful combi boilers from one of the best manufacturers in the UK.

This high-performance, range-topping boilers are built in the UK, highly reliable, highly efficient, and dependable, to help keep your energy bills and running costs to a minimum. The Green IQ development is Vaillant’s attempt at ultimate energy efficiency boilers.

Choosing a new Vaillant ecoTEC Exclusive with Green IQ combi boiler as a replacement for your old one has never been as easy. Let’s take a look at the new ecoTEC Exclusive combi boiler range. 

vaillant ecotec 835 combi boiler review exclusive

Vaillant ecoTEC Exclusive combi boiler review UK – A powerful range of boilers

The Vaillant ecoTEC Exclusive combi boiler range has two different boilers to choose from to ensure that they have a boiler that can suit most large homes in the UK. If your looking for a less powerful combi try the Vaillant ecoTEC Plus combi boilers.

The ecoTEC exclusive is their top-of-the-range combi boiler and is one of the best boilers on the market, not just in the ecoTEC range. it has a high flow rate and can cope with high hot water demand, even as a combi boiler. We’ll also give you an idea of how much a new boiler costs along the way.

Vaillant ecoTEC Exclusive Green IQ review

vaillant ecotec exclusive green iq combi boiler review

The ecoTEC Exclusive Green IQ is one of the best high-performance, high-efficiency combi boilers in the UK. This combi boiler is powerful yet super energy efficient due to being able to modulate down to as little as 10% capacity when required. It has a special heat exchanger which ensures that this boiler runs at the highest efficiency possible even when tasked with heating large homes and providing hot water to multiple taps, showers or other outlets. 

Vaillant ecoTEC exclusive 835 review

This is the smaller of the two in the ecoTEC exclusive combi boiler range but it is by no means any less capable. In any other range, this would be the best model, and with flow rates of 14.5 litres per minute, this combi boiler is more than capable in larger properties. Clearly, this isn’t going to be a compact boiler so you do require a reasonable space to put this boiler in but it is very quiet so if it is installed near living space then you will barely know it is there. You can get a 10-year warranty with this boiler also for years of hassle-free heating.

Vaillant ecoTEC Exlcusive Specifications

Vaillant ecoTEC Exclusive Green iQ Combination BoilerVaillant ecoTEC 843 exclusive Green iQVaillant ecoTEC 835 exclusive Green iQ
TypeGas BoilerGas Boiler
Warranty (Years)55
Width (mm)440440
Height (mm)720720
Depth (mm)474406
Weight (Kg)5042.5
ErP Space Heating EfficiencyAA
ErP Water Heating EfficiencyAA
Flow Rate (L/min)17.814.5
FuelNatural GasNatural Gas

Vaillant ecoTEC Exclusive 835 dimensions


Vaillant ecoTEC Exclusive 835 price

Vaillant ecoTEC Exclusive 835Combi Boiler£1,550
vaillant ecotec 843 combi boiler review

Vaillant ecoTEC exclusive 843 review

This is the most powerful combi boiler that Vaillant makes, so the ecoTEC Exclusive 843 is a powerhouse of a boiler that is perfect for larger properties. With a high flow rate to taps and showers of 17.8 litres per minute, this combi is designed for high hot water demand to multiple outlets. Energy efficiency is also key with this boiler as it can run at 10% capacity to save you a fortune on gas and electricity when the full power of the boiler isn’t required. 

Designed with a unique heat exchanger that offers some of the most energy-efficient heating capabilities in the UK, this boiler is also capable of running on any type of gas required. Surprisingly though, this boiler is very quite and has won the Quiet Mark accreditation too!. If you want years of hassle-free heating, you can also get a 10-year guarantee.

Vaillant ecoTEC Exclusive 843 dimensions


Note that the 835 is slightly deeper in size than the 835 combi boiler. 

Vaillant ecoTEC Exclusive 843 price

Vaillant ecoTEC Exclusive 843Combi Boiler£1,800

Vaillant ecoTEC Exclusive Combi boiler range review conclusion

The Vaillant ecoTEC combi boiler range is fantastic as it offers you a wide range of choices on different sized boilers and outputs. With regards to performance and reliability, they come out very well but these do come at a price. 

The entry ecoTEC Pro boiler range boiler prices start where some of the other boiler manufacturers mid-range boilers finish, such as the Worcester 4000 or Viessmann Vitodens 050-w which are over £200 less with better warranties and better technology such as built-in Wifi. They are also more compact too if you require to install your new boiler in a kitchen cupboard. You can get Vaillant boilers on finance too if you want to spread the cost of your boiler and pay monthly for it.

vaillant ecotec combi boiler review warranty

Vaillant ecoTEC combi boilers – Powerful and energy efficient for larger homes  

On the other hand, if you are looking for high-performance boilers with lots of power then these combi boilers are high on the list. With some of the highest flow rates possible from combi boilers, if you can afford the price tag of one of the more powerful boilers then we think they are one of the best options out there. 

Vaillant vSMART App Thermostats & Controls

The Vaillant vSMART app allows you to connect to your boiler and control your heating wherever you are. If you have chosen to install a new Vaillant boiler in your home for energy efficiency reasons, then the vSMART app is another way of helping to reduce your energy bills. It lets you turn your central heating off from anywhere you are with an internet connection and tell you how often your heating has been on or off. 

Hive & Nest

If you like your current Nest or Hive smart thermostat then the Vaillant ecoTEC range is compatible with these too. You can simply connect these upon installation and continue to control your heating as before. 

Vaillant ecoTEC Exclusive Boiler costs – Choosing the right boilers

If your looking for a new Vaillant boiler you want to get one at a great price. Comparing boiler prices online is the best way to do this. These new boilers cost slightly more than the competition but they are great boilers.

Get a Quote in 20 SecondsClick here >