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Vaillant EcoTEC Exclusive IQ 843 boiler

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Plumbproud rating

91.04%

Vaillant ecoTEC Exclusive IQ 843 Combi Gas boiler

Our PlumbProud quality scoring system uses many different factors, such as price installed, manufacturer guarantees, energy efficiency and the likely cost of running, among others, to determine a boiler's value for money rating. This Vaillant ecoTEC Exclusive IQ 843 Combi boiler scores 91.04%.

On most non-complicated installations, we would expect this Vaillant ecoTEC Exclusive IQ 843 Combi boiler to cost £2,800 including installation if you choose PlumbProud to do the work.

Please enter your postcode in the quote boxes on this page, email us, or call us on 01604 343053 to get a free quote and guidance on whether the Vaillant EcoTEC Exclusive IQ 843 boiler is the right choice for your home.


Installed price around

£2,800

GET A COMPETITIVE BOILER QUOTE

Please enter your postcode below to get a personalised quotation for the perfect boiler for your home

Vaillant ecoTEC Exclusive IQ 843 Combi Gas boiler frequently asked questions

Is the Vaillant EcoTEC Exclusive IQ 843 a system, regular or combi boiler?

When looking for a combi boiler for your house or flat, the Vaillant EcoTEC Exclusive IQ 843 might be a suitable option for you.

The UK has some of the smallest homes in the Western world, which is partly why combi boilers were introduced in the 1970s. Traditional boilers require one or more large storage tanks which they use to either heat water and keep it warm or store water intended for heating later. These tanks took up a lot of space in people's homes.

Combi boilers save space because they don't require these tanks to operate. Instead, combis draw water direct from your mains supply then instantly heat and distribute it on demand.

The biggest disadvantage in using combi boilers is that they have a maximum capacity volume for heating water. While this may not be an issue in a small household, it could be for a larger household where there is higher demand for hot water. When more than one person is using the water, it is distributed between the two points, reducing the pressure and temperature at each point.

Would the Vaillant EcoTEC Exclusive IQ 843 combi be a suitable choice of boiler for my house or flat?

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

The output rate of a boiler tells you how much power it has available to it for heating the water that comes out of your taps and warms your radiators. A higher output rate means that your boiler has more power at its disposal.

You need to make sure you select a boiler with the right output rate. That's because, if your output rate is too high, then your boiler will have more power than it needs but it will cost too much to run. If the output rate is too low, your water may often not be hot enough.

The Vaillant EcoTEC Exclusive IQ 843 combi's output is 43 kW, so which types of property would this Vaillant ecoTEC Exclusive IQ 843 Combi boiler be appropriate for?

A Gas Safe boiler installer would recommend that, at this level of output, the most suitable type of property for this Vaillant ecoTEC Exclusive IQ 843 Combi boiler would be larger properties including detached homes with 15 or more radiators and two or more bathrooms.

With combi boilers, you need to consider the flow rate as well as the output rate. The flow rate (shown in litres per minute) measures how much water your boiler can draw from the mains which it then instantly heats and distributes to your taps and radiators.

However, a high flow rate is of little to no value if your local water pressure is low. If your local mains water pressure is 10l/m and your flow rate is 12l/m, your boiler will only be able to process 10l/m.

If you live in an area with high water pressure but your household has multiple bathrooms and/or radiators and many members of your household want to use hot water at the same time (like morning or evening baths or showers), it's unlikely that you'll be able to find a combi with a high enough flow rate.

As an indication, a power shower needs about 10 litres of water per minute, whereas the flow rate of this Vaillant ecoTEC Exclusive IQ 843 Combi boiler is 18 L/ml/m.

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.


What are the proportions of a Vaillant EcoTEC Exclusive IQ 843 boiler?

The Vaillant EcoTEC Exclusive IQ 843's dimensions are 720 mm [H] x 440 mm [W] x 474 mm [D].

Is the Vaillant EcoTEC Exclusive IQ 843 condensing or non-condensing?

Condensing boilers convert the warmth present in flue exhaust gases and water vapour condensation into heat which they then recycle to increase the temperature of the colder water returning to your system.

We recommend that homeowners choose a condensing boiler like the Vaillant EcoTEC Exclusive IQ 843 for this reason - the more recent your model the better because the technology improves every year.

You'll benefit from lower quarterly gas bills and condensing boilers are also much more environmentally friendly.

Is the Vaillant EcoTEC Exclusive IQ 843 combi boiler rated as environmentally friendly?

How we heat our homes is an issue which many homeowners worry about as the world combats climate change and environmental damage.

14% of the total amount of greenhouse gases produced by the UK comes from the central heating systems we use. In some of Britain's biggest cities, gas boilers create dangerous levels of nitrogen dioxide in the atmosphere.

Would choosing a Vaillant EcoTEC Exclusive IQ 843 combi help in the fight against climate change? What do the performance statistics suggest?

Every boiler manufactured and supplied in the UK must have an energy efficiency rating of 92% (SEDBUK “A” rating). These minimums were made law in April 2018 - before that, the minimum energy efficiency rating was 88% (88%/89% = "B" SEDBUK grade, 90%+ = "A" SEDBUK grade).

The Vaillant EcoTEC Exclusive IQ 843 was awarded an efficiency rating of 94% and a band rating of "A".

Energy efficiency ratings for boilers describe the amount of energy they use and waste when switched on and working.

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 843 is rated "A" for heat and "A" for water.

How long is the warranty offered by the manufacturer for the Vaillant EcoTEC Exclusive IQ 843 boiler?

Parts and labour charges incurred for repairs made to your new Vaillant EcoTEC Exclusive IQ 843 are covered by a 5 year warranty.


Vaillant ecoTEC Exclusive IQ 843 Gas Combi boiler specifications

Powered by GasGas
LocationExternal
Condensing?Yes
Efficiency rating94%
Band ratingA
LPG Compatible?Yes
P/L Warranty5 Years
Output in kW43 kW
Height720 mm
Width440 mm
Depth474 mm
MountingWall
Flow rate18 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 843 Combi Gas boiler

  1. Home
  2. Vaillant ecoTEC Exclusive IQ 843
Plumbproud rating for this boiler
91.04%

We score each boiler we sell by considering a number of different factors including price installed, manufacturer guarantees, energy efficiency, the likely cost of running, and more. For this Vaillant ecoTEC Exclusive IQ 843 Combi boiler, we have awarded a rating of 91.04%.

We estimate that this Vaillant ecoTEC Exclusive IQ 843 Combi boiler will cost £2,800 fully installed through PlumbProud provided that the fit is straightforward.

If you would like to get in touch with us for a free quote and professional guidance and advice on whether the Vaillant EcoTEC Exclusive IQ 843 is the right choice for your home, you can do so by entering your postcode in the quote boxes on this page, calling us on 01604 343053 or you can click here to email us.


Installed price guideline
£2,800

Get your free quote

Vaillant ecoTEC Exclusive IQ 843 Gas Combi boiler specifications

Powered by GasGas
LocationExternal
Condensing?Yes
Efficiency rating94%
Band ratingA
LPG Compatible?Yes
P/L Warranty5 Years
Output in kW43 kW
Height720 mm
Width440 mm
Depth474 mm
MountingWall
Flow rate18 L/m
ERP HeatA
ERP WaterA

Vaillant ecoTEC Exclusive IQ 843 Combi Gas boiler frequently asked questions

Is the Vaillant EcoTEC Exclusive IQ 843 a combi, system or regular boiler?

If you want a combi boiler for your flat or house, the Vaillant EcoTEC Exclusive IQ 843 might be an option for you to consider.

The UK has some of the smallest homes in the Western world, which is partly why combi boilers were introduced in the 1970s. Traditional boilers require one or more large storage tanks which they use to either heat water and keep it warm or store water intended for heating later. These tanks took up a lot of space in people's homes.

Combi boilers save space because they don't require these tanks to operate. Instead, combis draw water direct from your mains supply then instantly heat and distribute it on demand.

The biggest disadvantage in using combi boilers is that they have a maximum capacity volume for heating water. While this may not be an issue in a small household, it could be for a larger household where there is higher demand for hot water. When more than one person is using the water, it is distributed between the two points, reducing the pressure and temperature at each point.

Should I choose a Vaillant EcoTEC Exclusive IQ 843 combi boiler for my house or flat?

Selecting the right boiler for your property means selecting a boiler that is the right size. And, by size, we don't mean how big it is, we mean how powerful it is - the "output".

The output of a boiler is measured in kilowatts. The output level determines the maximum power a boiler can use in heating the water needed for the baths, showers, taps and radiators in your home.

It's important to choose a boiler with an appropriate level of output for your property. Your boiler should be able to cope with periods of peak demand in your property and not just your average usage.

An output rate that is too low will result in an inadequate supply of hot water, while an output that is too high will mean the boiler will cost more to run than is necessary.

The output of the Vaillant EcoTEC Exclusive IQ 843 combi is 43 kW kilowatts, so which types of property would this be appropriate for?

A heating engineer would recommend that this Vaillant ecoTEC Exclusive IQ 843 Combi boiler would provide adequate heating and hot water for larger properties including detached homes with up to 15 or more radiators and two or more bathrooms.

You also need to choose a combi boiler with the right flow rate for where you live.

A combi boiler's flow rate is the maximum volume of water (measured in litres per minute) that it can heat and distribute to your radiators, taps and showers at the same time. This Vaillant ecoTEC Exclusive IQ 843 Combi boiler's flow rate is 18 L/m.

However, combi boilers like the Vaillant EcoTEC Exclusive IQ 843 draw water directly from the mains and heat it instantly.

If your mains pressure is 12 litres per minute, your boiler can only heat and distribute hot water at a rate of 12 litres per minute even if it has a higher flow rate.

Combi boilers also struggle when multiple people in your home want to use hot water at the same time - for example, someone running the hot water tap in the kitchen and two people wanting to shower in separate bathrooms.

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 843

The size of the Vaillant EcoTEC Exclusive IQ 843 boiler is 720 mm tall, 440 mm wide, and 474 mm deep.

Is the Vaillant EcoTEC Exclusive IQ 843 non-condensing or condensing?

We recommend that you choose a condensing boiler wherever possible like the Vaillant EcoTEC Exclusive IQ 843 - try to go for the latest model, if possible, to take advantage of improving technology.

Condensing boilers capture and recycle the warmth still present in the water vapour condensation and in flue exhaust emissions created by burning gas to make them more efficient and economical to run.

You will save money on your gas bills too, plus condensing boilers are friendlier to the environment.

How environmentally friendly is the Vaillant EcoTEC Exclusive IQ 843 combi?

As more of us are increasingly concerned about climate change, how we heat our homes and its impact on the environment has become an issue of importance to homeowners.

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.

Would choosing a Vaillant EcoTEC Exclusive IQ 843 combi help the environment? Let’s see what the performance figures suggest.

The energy efficiency rating for a boiler describes the amount of energy it uses and wastes during operation and there are two different ways to measure it.

All boilers manufactured and supplied in the UK must have a SEDBUK rating of “A” subject to a minimum energy efficiency score of 92% or above. Before April 2018, the minimum energy efficiency score was 88% (88/89% = "B" SEDBUK rating, 90%+ = "A" SEDBUK rating).

The Vaillant EcoTEC Exclusive IQ 843 scored an efficiency rating of 94% and a SEDBUK band rating of A.

The ERP, short for the Energy Related Products Directive, is a European directive aimed at encouraging manufacturers to create products that are environmentally friendlier at all stages, including during manufacturing, when the product is in active use, right through to the point of final disposal.

The Vaillant EcoTEC Exclusive IQ 843 has a rating of "A" for heat and "A" for hot water production.

How long is the warranty period on a Vaillant EcoTEC Exclusive IQ 843 combi boiler?

The Vaillant EcoTEC Exclusive IQ 843 boiler is covered by 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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