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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

We have determined a rating of 91.04% for this Vaillant ecoTEC Exclusive IQ 843 Combi boiler on the PlumbProud quality scoring system. The rating is determined using a variety of important factors including price installed, manufacturer guarantees, energy efficiency and the likely cost of running.

We would expect this Vaillant ecoTEC Exclusive IQ 843 Combi boiler to cost £2,800 fully installed through PlumbProud, although it will cost more if the fit is complicated. We will provide you with a full quote before starting work, however.

Get a better understanding of installation costs for the Vaillant EcoTEC Exclusive IQ 843 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 around

£2,800

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Vaillant ecoTEC Exclusive IQ 843 Combi Gas boiler frequently asked questions

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

The Vaillant EcoTEC Exclusive IQ 843 is worthy of consideration if you're looking for a combi boiler for your flat or house.

Combination or combi boilers are highly efficient and save a lot of space in your home. Combi boilers heat water directly from the mains when you turn on a tap and, as a result, you don’t need a hot water storage cylinder or a cold water tank in the roof space.

These boilers are, therefore, suitable for smaller homes and especially those without a loft. They are also cost-effective as the water is heated instantly and distributed on demand rather than being stored. Combi boilers are the most popular type of boilers in the UK and replacing an older boiler with a new combi boiler will reduce your gas bills significantly.

However, there are downsides to this type of boiler. If you take a shower while someone else is using a tap, less water will reach each point of usage at lower rates of pressure and temperatures as combi boilers can only heat a certain volume of water at any given time.

Is the Vaillant EcoTEC Exclusive IQ 843 combi boiler from the EcoTEC Exclusive IQ range a suitable choice for my house or flat?

Whether this Vaillant ecoTEC Exclusive IQ 843 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 843 combi is 43 kW, so which types of property is this Vaillant ecoTEC Exclusive IQ 843 Combi boiler appropriate for?

Most experienced Gas Safe boiler installers would recommend this Vaillant ecoTEC Exclusive IQ 843 Combi boiler as a suitable option for larger properties including detached homes with no more than 15 or more radiators and two or more bathrooms.

The Vaillant EcoTEC Exclusive IQ 843 is a combi boiler, which that means that you need to take the flow rate (measured in litres per minute) into account as well as the output rate. This Vaillant ecoTEC Exclusive IQ 843 Combi boiler's flow rate is 18 L/m.

Combis draw water from the mains, instantly heating and distributing it where it's needed - taps, radiators, bathrooms, and so on.

However, this means that the flow rate of a boiler may effectively be capped by the flow rate of the mains water supply. For example, if your mains pressure is 12l/m, that is the maximum flow rate that your boiler can achieve even if you choose a boiler with a flow rate of 18l/m.

In addition, if your home has more than one bathroom, a high number of radiators, and more than one member of your household wants to use hot water at the same time regularly, the flow rate of both the boiler and the mains water pressure may not be high enough.

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 dimensions of the Vaillant EcoTEC Exclusive IQ 843 boiler?

The Vaillant EcoTEC Exclusive IQ 843 measures 720 mm high and 440 mm wide by a depth of 474 mm.

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

The Vaillant EcoTEC Exclusive IQ 843 is a condensing gas boiler - where possible, we always recommend to clients that they choose one of the very latest condensing boilers to take advantage of this technology, which improves year after year.

Condensing boilers are more energy-efficient as they capture and recycle the heat contained in flue exhaust gases and water vapour condensation. They then use this heat to perform tasks like warming up colder water returning to the boiler from the radiators.

By choosing a condensing boiler, you'll help the environment as well as save money on your gas bills.

Is the Vaillant EcoTEC Exclusive IQ 843 combi environmentally friendly?

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.

We generate 14% of UK greenhouse gas emissions through centrally heating our domestic properties. Gas boilers are mainly responsible for harmful nitrogen dioxide emissions in larger British cities.

Do the available figures suggest that installing the Vaillant EcoTEC Exclusive IQ 843 combi in your property would be an environmentally friendly choice?

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 843 is rated as 94% energy efficient, equivalent to a "A" SEDBUK rating.

The Energy Related Products Directive (ERP) is European legislation that applies to all products which use or consume energy during their lifespan, including during the manufacturing process and when they're in actual use, right through to the point of final disposal.

The aim is to encourage manufacturers to create new products that are kinder to the environment and create fewer harmful gas emissions.

The Vaillant EcoTEC Exclusive IQ 843 has an ERP Heat rating of "A" and an ERP Water rating of "A".

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

The Vaillant EcoTEC Exclusive IQ 843 is supplied with a parts and labour warranty of 5 years.


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

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

On the PlumbProud quality scoring system, we rate this Vaillant ecoTEC Exclusive IQ 843 Combi boiler 91.04%. To determine our rating, we take lots of different factors into consideration from price installed to manufacturer guarantees, energy efficiency, likely cost of running, and more.

Provided the proposed installation is straightforward, we would anticipate that this Vaillant ecoTEC Exclusive IQ 843 Combi boiler will cost £2,800 fully installed through PlumbProud.

We offer free quotes and professional advice and guidance on whether the Vaillant EcoTEC Exclusive IQ 843 is a suitable choice for your home via a phone call on 01604 343053. Alternatively, please click here to email us or enter your postcode in the quote boxes on this page.


Installed price guideline
£2,800

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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?

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

In the past, most boilers needed one or more storage tanks to operate - one to store warm water and the other for storing water to be heated later. But storage tanks are problematic in properties where space is at a premium and particularly where there is no loft. Many properties in the UK are small and so manufacturers introduced combi boilers in the 1970s to eliminate the need for tanks.

With a combi boiler, the hot water for your radiators and taps is delivered on demand. The boiler instantly heats water it draws directly from the mains internally. It then distributes the heated water around your home at mains pressure as you need it.

It is important to bear in mind that, while combi boilers have many benefits, they can only heat a certain volume of water at any given time. This means that, if you run a shower at the same time as someone else is doing the washing up in the kitchen, the volume of water passing to each point will drop, causing a fall in pressure.

Is the Vaillant EcoTEC Exclusive IQ 843 combi boiler suitable for my house or apartment?

You should make sure that the boiler you choose for your property is the right "size". And size doesn't mean its physical dimensions. Size means how much power it has - the "output".

A boiler's output level measures how much power it can use to provide you with the hot water you need for your radiators and taps. If a boiler has a high output rate, it can heat greater volumes of water.

If you choose a boiler with too low an output, you'll find that the water coming out of your taps and in your radiators won't be as hot as you want it to be. Choosing one whose output is too high means you'll pay more than you need to for the gas your boiler needs to work.

The Vaillant EcoTEC Exclusive IQ 843 combi outputs at a maximum of 43 kW, so which types of property would this Vaillant ecoTEC Exclusive IQ 843 Combi boiler be appropriate for?

An experienced PlumbProud Gas Safe engineer would recommend that the level of output from this Vaillant ecoTEC Exclusive IQ 843 Combi boiler would make it a suitable installation option for larger properties including detached homes with 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.


What size is a Vaillant EcoTEC Exclusive IQ 843 boiler?

The measurements of the Vaillant EcoTEC Exclusive IQ 843 are 720 mm by 440 mm by 474 mm.

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

Because of their increased energy efficiency, we recommend to all customers that they select one of the latest condensing boilers. Condensing boilers capture the heat from water vapour condensation and flue exhaust gases and recycle that heat to warm water entering the boiler (for example, from your radiators).

The Vaillant EcoTEC Exclusive IQ 843 is a condensing gas boiler and choosing this model will result in a likely substantial reduction in your fuel bills, particularly if you're replacing an older, inefficient, non-condensing boiler.

Is the Vaillant EcoTEC Exclusive IQ 843 combi a good choice for the environment?

As more of us become concerned by the effects of climate change, the damage we do to the environment by heating our homes has emerged as an important issue for many homeowners.

As much as 14% of the UK’s greenhouse gas production derives from our domestic central heating systems. Gas boilers are responsible for dangerous levels of nitrogen dioxide emissions in Britain's largest cities.

Is the Vaillant EcoTEC Exclusive IQ 843 combi an environmentally friendly choice for your home? Let’s have a look at the figures.

In the UK, by law, all boilers manufactured since April 2018 must have a SEDBUK “A” rating and operate to a minimum level of 92% energy efficiency. Prior to this, the minimum was 88% – 88/89% would score a "B" and 90% or more an "A" on the SEDBUK scale.

The energy efficiency rating measures the amount of energy a boiler consumes when it's in use and how much it loses on non-core operations.

Following testing, the Vaillant EcoTEC Exclusive IQ 843 was given an efficiency rating of 94% and a SEDBUK grading of "A".

The ERP (or Energy Related Products Directive) is European legislation which applies to all products that consume energy throughout their lifetime.

Its purpose is to encourage manufacturers to offer products that are kinder to the environment by reducing harmful gas emissions at all stages, from production and end use right through to disposal.

The ERP rating for the Vaillant EcoTEC Exclusive IQ 843 is "A" for heat and "A" for water.

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

The Vaillant EcoTEC Exclusive IQ 843 is covered by a parts and labour warranty of 5 years following installation.


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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