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Vaillant EcoTEC Exclusive IQ 835 boiler

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Plumbproud rating

91.90%

Vaillant ecoTEC Exclusive IQ 835 Combi Gas boiler

Using factors such as price installed, manufacturer guarantees, energy efficiency and the likely cost of running, among others, this model has been rated as scoring 91.90% on the PlumbProud boiler benchmarking system.

On straightforward installations, we would expect to charge you £2,600 for this Vaillant ecoTEC Exclusive IQ 835 Combi boiler fully installed.

We recommend that you speak to our friendly advisors by calling 01604 343053 to seek professional advice on whether the Vaillant EcoTEC Exclusive IQ 835 boiler is right for your home. Our team can also provide you with a free quotation for this Vaillant ecoTEC Exclusive IQ 835 Combi boiler. Alternatively, click here to email us or enter your postcode into the quotation box on this page.


Installed price around

£2,600

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Vaillant ecoTEC Exclusive IQ 835 Combi Gas boiler frequently asked questions

What type of boiler is Vaillant’s EcoTEC Exclusive IQ 835 - system, regular or combi?

If you’re looking for a combi boiler for your house or flat, you may wish to the consider the Vaillant EcoTEC Exclusive IQ 835.

In many properties, combi boilers are more suitable than traditional types of boiler. Combi boilers heat water instantly on demand, which they draw directly from the mains supply, removing the need for storage tanks that can take up valuable space in your home.

A combi boiler is often the right choice for a smaller property, particularly if your home doesn't have a useable loft. As water is heated and delivered immediately rather than being kept warm for hours in an immersion tank, combi boilers reduce gas usage, thereby minimising your heating costs.

The main disadvantage of combi boilers is that they can only heat a certain amount of water at any one time. This means that, if two people are using different taps or showers within your home at the same time, the flow of heated water to each will be reduced, as will the water pressure and temperature.

Is the Vaillant EcoTEC Exclusive IQ 835 combi suitable for my house or flat?

Whether this Vaillant ecoTEC Exclusive IQ 835 Combi boiler is right for where you live depends on its size or "output" level. Size does not mean its physical dimensions, however - it means how powerful it is.

Measured in kilowatts, a boiler's output level is an indication of the amount of power it has available to it to heat the water coming from your taps and for warming your radiators. The greater the output level, the more water it can heat.

If you choose a boiler whose output level is too low, you'll often find that the water is not as hot as you want it to be. If you choose a boiler whose level is too high, you'll be paying higher gas bills than you need to for years to come.

The output of the Vaillant EcoTEC Exclusive IQ 835 combi is 35 kW, so which types of property is this Vaillant ecoTEC Exclusive IQ 835 Combi boiler appropriate for?

Most Gas Safe boiler installers would suggest that the most suitable type of property for installing this Vaillant ecoTEC Exclusive IQ 835 Combi boiler in would be larger properties including detached homes with 15 or more radiators and two or more bathrooms.

You'll also need to be sure to choose a combi boiler with the right flow rate for your home.

The flow rate indicates the maximum volume of hot water (measured in litres per minute) that your boiler can distribute at any given time. This means that if you and your family are likely to be using several taps and showers simultaneously or you have a lot of radiators, you need a boiler with a high flow rate. This Vaillant ecoTEC Exclusive IQ 835 Combi boiler's flow rate is 15 L/m.

As with all combi boilers, the Vaillant EcoTEC Exclusive IQ 835 is only able to heat and distribute water at the rate at which it actually enters your property.

For this reason, you shouldn't purchase a boiler with a very high flow rate if the flow rate in your mains pipes is lower because the extra capacity doesn't mean it can draw more water from the mains pipes.

When our engineer comes out to quote you, they may recommend that you choose a heat only boiler or system boiler instead if your family's demand for hot water is higher than normal.


How large is a Vaillant EcoTEC Exclusive IQ 835 boiler?

The dimensions of the Vaillant EcoTEC Exclusive IQ 835 are 720 mm [H] x 440 mm [W] x 406 mm [D].

Is the Vaillant EcoTEC Exclusive IQ 835 non-condensing or condensing?

The Vaillant EcoTEC Exclusive IQ 835 is a condensing gas boiler - this is the type of boiler we recommend to most clients because they're better for the environment and they will save money on annual fuel bills.

A condensing boiler captures and recycles the warmth still present in both the flue exhaust gases and water vapour condensation created when gas is burned to provide your boiler with power.

This means it needs less gas to operate and it uses this extra energy to perform a number of tasks, including heating the colder water that comes back to the boiler from the radiators in your home.

Is the Vaillant EcoTEC Exclusive IQ 835 combi environmentally friendly?

As the British public has become more conscious of climate change, many homeowners consider the environment when choosing how to heat their homes.

14% of the UK’s greenhouse gas production comes from central heating. In the bigger cities, gas boilers in particular are responsible for dangerous levels of nitrogen dioxide emissions.

If you decide to install a Vaillant EcoTEC Exclusive IQ 835 combi in your home, will you be helping the environment with your choice? Let’s have a look at the figures.

All boilers manufactured and supplied in the UK must achieve an energy efficiency rating of at least 92% (an "A" SEDBUK grade). This is higher than the previous 88%, which was a legal requirement prior to April 2018.

The energy efficiency rating is used to work out how much energy a boiler both uses and wastes when it's switched on and working correctly - its standard functioning and operation.

The Vaillant EcoTEC Exclusive IQ 835 is rated as 94% energy efficient, equivalent to a "A" SEDBUK rating.

The Energy Related Products Directive grades products according to the energy they consume and the harmful gas emissions they create, from manufacturing right through to final disposal, including how they're used by customers between these two points.

The Vaillant EcoTEC Exclusive IQ 835 is rated "A" for heat and "A" for water.

How long is the warranty period on a Vaillant EcoTEC Exclusive IQ 835 combi boiler?

The Vaillant EcoTEC Exclusive IQ 835 is covered by a parts and labour warranty of 5 years following installation.


Vaillant ecoTEC Exclusive IQ 835 Gas Combi boiler specifications

Powered by GasGas
LocationExternal
Condensing?Yes
Efficiency rating94%
Band ratingA
LPG Compatible?Yes
P/L Warranty5 Years
Output in kW35 kW
Height720 mm
Width440 mm
Depth406 mm
MountingWall
Flow rate15 L/m
ERP HeatA
ERP WaterA

The top 10 rated Gas Combi boilers

Using the Plumbproud scoring system, the current 10 ten Gas Combi boilers assessed using a number of important variables are as follows:

1Vaillant ecoTEC Plus 82593.35%
2Vaillant ecoTEC Plus 83292.98%
3Worcester Bosch Greenstar 2000 25kW92.89%
4Viessmann Vitodens 050-W 29kW92.66%
5Vaillant ecoTEC Plus 83592.60%
6Worcester Bosch Greenstar CDi Compact 2892.57%
7Vaillant ecoFIT Pure 82592.39%
8Vaillant ecoTEC Plus 83892.16%
9Vaillant ecoTEC Exclusive IQ 83591.90%
10Vaillant ecoTEC Pro 2491.77%

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Vaillant ecoTEC Exclusive IQ 835 Combi Gas boiler

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  2. Vaillant ecoTEC Exclusive IQ 835
Plumbproud rating for this boiler
91.90%

On the PlumbProud quality scoring system, we rate this Vaillant ecoTEC Exclusive IQ 835 Combi boiler at 91.90%. To determine a boiler's quality, we consider many different factors from price installed to manufacturer guarantees, energy efficiency, likely cost of running, and more.

This Vaillant ecoTEC Exclusive IQ 835 Combi boiler will cost around £2,600 fitted through PlumbProud where there are no complications during the installation.

Get a better understanding of installation costs for the Vaillant EcoTEC Exclusive IQ 835 by entering your postcode in the box supplied on this page. You can also call our professional team with any boiler-related queries on 01604 343053. Alternatively, please click here to email us.


Installed price guideline
£2,600

Get your free quote

Vaillant ecoTEC Exclusive IQ 835 Gas Combi boiler specifications

Powered by GasGas
LocationExternal
Condensing?Yes
Efficiency rating94%
Band ratingA
LPG Compatible?Yes
P/L Warranty5 Years
Output in kW35 kW
Height720 mm
Width440 mm
Depth406 mm
MountingWall
Flow rate15 L/m
ERP HeatA
ERP WaterA

Vaillant ecoTEC Exclusive IQ 835 Combi Gas boiler frequently asked questions

What type of boiler is Vaillant’s EcoTEC Exclusive IQ 835 - system, regular or combi?

The Vaillant EcoTEC Exclusive IQ 835 is a combi boiler you may wish to consider if you want this particular type of boiler for your house or flat.

Combi boilers have much to recommend them - not least the fact that they save a lot of space. Combination (or combi) boilers were introduced by manufacturers in the 1970s to provide practical central heating and hot water distribution to smaller properties - remember that UK houses and flats tend to be among the smallest in the developed world.

Traditional boilers require one or more storage tanks to keep hot water warm and to store water for heating later. In contrast, combi boilers draw water directly from the mains supply and heat it instantly, removing the need for a storage tank. The heated water is then distributed to your taps and radiators on demand.

While combi boilers are suitable choices for many properties, especially those without a loft, there is also a disadvantage in using them. Water is heated instantly and the volume of water that can be heated at any one time is limited. This can result in less water being sent to taps and showers if more than one is being used simultaneously. In these instances, the water pressure to both points will drop.

Should I install a Vaillant EcoTEC Exclusive IQ 835 combi boiler in my house or apartment?

To determine that, we need to consider the size of the boiler. However, size doesn't refer to how big a boiler is - it means the size of its "output".

Your boiler’s output is a measurement of the power it has available to heat the volume of water required for your taps and radiators. The higher the output rate, the more water it can heat.

You need to be careful to select a boiler with the optimal level of output for your property though. That's because, if your boiler output is too low, your water and radiators will often not be as hot as you want them to be. If the output is too high, you’ll be paying more for gas than you need to.

The output of the Vaillant EcoTEC Exclusive IQ 835 combi is 35 kW, so which types of property would this Vaillant ecoTEC Exclusive IQ 835 Combi boiler be appropriate for?

Most Gas Safe engineers would suggest that the Vaillant EcoTEC Exclusive IQ 835 combi boiler would be a suitable choice for installation in larger properties including detached homes with 15 or more radiators and two or more bathrooms.

You'll also need to be sure to choose a combi boiler with the right flow rate for your home.

The flow rate indicates the maximum volume of hot water (measured in litres per minute) that your boiler can distribute at any given time. This means that if you and your family are likely to be using several taps and showers simultaneously or you have a lot of radiators, you need a boiler with a high flow rate. This Vaillant ecoTEC Exclusive IQ 835 Combi boiler's flow rate is 15 L/m.

As with all combi boilers, the Vaillant EcoTEC Exclusive IQ 835 is only able to heat and distribute water at the rate at which it actually enters your property.

For this reason, you shouldn't purchase a boiler with a very high flow rate if the flow rate in your mains pipes is lower because the extra capacity doesn't mean it can draw more water from the mains pipes.

When our engineer comes out to quote you, they may recommend that you choose a heat only boiler or system boiler instead if your family's demand for hot water is higher than normal.


The size of the Vaillant EcoTEC Exclusive IQ 835 in millimetres

The size of the Vaillant EcoTEC Exclusive IQ 835 boiler is 720 mm tall, 440 mm wide, and 406 mm deep.

Is the Vaillant EcoTEC Exclusive IQ 835 a condensing or non-condensing boiler?

The Vaillant EcoTEC Exclusive IQ 835 is a condensing gas boiler - we strongly suggest that you choose either this model or a recently released model if at all possible.

A condensing boiler captures and recycles the warmth present in flue exhaust gases and water vapour condensation created by the burning of gas to warm up the water coming back into your boiler - for example, from your radiators.

Condensing boilers cost less to run (lower gas bills) and are better for the environment.

Is the combi Vaillant EcoTEC Exclusive IQ 835 boiler energy efficient?

The effects of climate change on the environment are leading many homeowners to question the damage they might be doing by the way they heat their homes.

Nitrogen dioxide emissions in Britain's largest cities are at dangerous levels and this has been caused by gas boilers. In fact, 14% of the UK’s greenhouse gases are produced by central heating.

Let's take a closer look at whether installing a Vaillant EcoTEC Exclusive IQ 835 combi would be a good choice for the environment.

All boilers manufactured after April 2018 in the UK must be rated as an “A” on the SEDBUK grading system, subject to a minimum energy efficiency rating of 92% or above. Before that, the minimum rate was 88% - boilers with an energy efficiency of 88% or 89% were given a “B” rating. Boilers scoring 90% or more were given an "A" rating.

The energy efficiency rating for a boiler describes the amount of energy it uses and how much goes to waste in operation.

The Vaillant EcoTEC Exclusive IQ 835 has an efficiency rating of 94% with a SEDBUK grade of "A".

The Energy Related Products (ERP) Directive is a European directive which applies to all products that consume energy over their lifetime.

It encourages companies to create products that are environmentally friendlier at all life cycle stages, including initial manufacturing and end use through to final disposal, with the aim of reducing harmful gas emissions.

The Vaillant EcoTEC Exclusive IQ 835 is rated "A" for heat and "A" for water.

Am I covered if the Vaillant EcoTEC Exclusive IQ 835 combi boiler breaks down?

The Vaillant EcoTEC Exclusive IQ 835 is supplied with a parts and labour warranty of 5 years.


The top 10 rated Gas Combi boilers

Using the Plumbproud scoring system, the current 10 ten Gas Combi boilers assessed using a number of important variables are as follows:

1Vaillant ecoTEC Plus 82593.35%
2Vaillant ecoTEC Plus 83292.98%
3Worcester Bosch Greenstar 2000 25kW92.89%
4Viessmann Vitodens 050-W 29kW92.66%
5Vaillant ecoTEC Plus 83592.60%
6Worcester Bosch Greenstar CDi Compact 2892.57%
7Vaillant ecoFIT Pure 82592.39%
8Vaillant ecoTEC Plus 83892.16%
9Vaillant ecoTEC Exclusive IQ 83591.90%
10Vaillant ecoTEC Pro 2491.77%
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