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Vaillant EcoTEC Plus 938 boiler

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Plumbproud rating

91.46%

Vaillant ecoTEC Plus 938 Combi Gas boiler

On the PlumbProud quality scoring system, we rate this Vaillant ecoTEC Plus 938 Combi boiler at 91.46%. 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 Plus 938 Combi boiler will cost around £2,700 fitted through PlumbProud where there are no complications during the installation.

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 Plus 938 boiler is the right choice for your home.


Installed price around

£2,700

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Vaillant ecoTEC Plus 938 Combi Gas boiler frequently asked questions

Is the Vaillant EcoTEC Plus 938 a combi boiler, system boiler or regular boiler?

The Vaillant EcoTEC Plus 938 may be worth considering if you are looking for a combi boiler for your house or flat.

One of the reasons the combi boiler was introduced to Britain in the 1970s was because residential properties are among the smallest in the world. More traditional boilers require one or more large tanks to be stored around the home to function.

A combi boiler is a self-contained unit that draws water from the mains then heats and distributes it instantly and on demand - no tanks are needed.

They are the most popular type of boilers in the UK and offer only one major disadvantage - there is a maximum volume of water that can be heated at any one time. If that limit is exceeded by, for example, two people using a hot water tap at the same time, there will be a drop in water pressure, temperature and volume to both taps.

Is the Vaillant EcoTEC Plus 938 combi boiler suitable for my house or apartment?

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.

Your boiler's output indicates the maximum amount of power available to it to heat the water you need to warm your radiators or when you want hot water from your taps. A higher output rate means that your boiler is capable of heating greater volumes of water.

If a boiler's output rate is too low, you'll often find that the water is not as hot as you want it to be. Too high, however, and you'll end up paying more for your gas than you should be.

The Vaillant EcoTEC Plus 938 combi boiler has an output rate of 38.7 kW, so which types of property would this be suitable for?

An experienced Gas Safe boiler installer would recommend that this Vaillant ecoTEC Plus 938 Combi boiler would be a suitable installation choice for larger properties including detached homes with 15 or more radiators and two or more bathrooms.

Please remember too that all combi boilers draw water from the mains - they have no storage tanks. Combis heat the water from the mains on demand and then send it to wherever it's needed in the house, like a radiator, a bathroom or a kitchen.

The speed at which it can do this is called the "flow rate", which is measured in litres per minute. If you have a lot of radiators and bathrooms in your home and multiple people are regularly trying to use the hot water at one time, such as in the morning or evening, you'll need a combi with a high flow rate. This Vaillant ecoTEC Plus 938 Combi boiler's flow rate is 16 L/m.

However, it's not that simple. Combis can only draw water from the mains at the speed it's delivered. If the flow rate of the local water supply is 11l/m, you shouldn't purchase a boiler with a flow rate of 17l/m because it will never be able to use that extra capacity.

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.


Dimensions of the Vaillant EcoTEC Plus 938 boiler

The Vaillant EcoTEC Plus 938 measures 720 mm tall, 440 mm wide, and 600 mm deep.

Is this Vaillant boiler condensing or non-condensing?

We recommend that, if possible, you choose a condensing boiler like the Vaillant EcoTEC Plus 938.

Condensing boilers are more energy-efficient. They achieve this efficiency by capturing the heat present in flue exhaust gases and water vapour condensation and recycling that heat to, for example, warm colder water coming back from your radiators.

By choosing the latest condensing boiler, you'll also notice a significant reduction in your gas bills, particularly if you're replacing a boiler more than 15 years old.

How energy efficient is the Vaillant EcoTEC Plus 938 combi?

With more and more of us concerned about environmental issues and climate change, how we heat our homes has become an important issue to many homeowners.

The heating of our homes accounts for 14% of the UK's greenhouse gas emissions. Especially in the big cities, gas boilers are responsible for dangerous levels of nitrogen dioxide emissions.

Will installing a Vaillant EcoTEC Plus 938 combi in your home be a positive contribution to the environment? The figures below will tell you more.

The energy efficiency rating of the Vaillant EcoTEC Plus 938 is 94% with a SEDBUK band rating of "A".

Energy efficiency tests record how much energy is wasted on non-core functions during an operation.

By law, all boilers manufactured and supplied in the UK must have a minimum energy efficiency performance level of 92% (equivalent to a SEDBUK "A" grade). Up to April 2018, the minimum performance level was 88% (88% and 89% are equivalent to a SEDBUK "B" grade and 90%+ an "A" grade).

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 Plus 938 has a rating of "A" for heat and "A" for hot water production.

Am I covered if my Vaillant EcoTEC Plus 938 combi boiler breaks down?

Parts and labour charges incurred for repairs made to your new Vaillant EcoTEC Plus 938 are covered by a 5 year warranty.


Vaillant ecoTEC Plus 938 Gas Combi boiler specifications

Powered by GasGas
LocationExternal
Condensing?Yes
Efficiency rating94%
Band ratingA
LPG Compatible?No
P/L Warranty5 Years
Output in kW38.7 kW
Height720 mm
Width440 mm
Depth600 mm
MountingWall
Flow rate16 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 Plus 938 Combi Gas boiler

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  2. Vaillant ecoTEC Plus 938
Plumbproud rating for this boiler
91.46%

Our PlumbProud quality scoring system considers important factors like energy efficiency, the length of a manufacturer’s guarantee, likely running costs, and installed price to determine a boiler's value for money. This model has received 91.46% from our engineers.

You should budget around £2,700 for the supply and installation of this Vaillant ecoTEC Plus 938 Combi boiler by PlumbProud.

Wondering if the Vaillant EcoTEC Plus 938 is the right boiler for your home? Then speak to a professional here by getting in touch via email or call us on 01604 343053. You can also get a free quote by entering your postcode in the box on the page.


Installed price guideline
£2,700

Get your free quote

Vaillant ecoTEC Plus 938 Gas Combi boiler specifications

Powered by GasGas
LocationExternal
Condensing?Yes
Efficiency rating94%
Band ratingA
LPG Compatible?No
P/L Warranty5 Years
Output in kW38.7 kW
Height720 mm
Width440 mm
Depth600 mm
MountingWall
Flow rate16 L/m
ERP HeatA
ERP WaterA

Vaillant ecoTEC Plus 938 Combi Gas boiler frequently asked questions

Is the Vaillant EcoTEC Plus 938 a standard, combi or system boiler?

The Vaillant EcoTEC Plus 938 is worthy of consideration if you're looking for a combi boiler for your flat or house.

One of the reasons the combi boiler was introduced to Britain in the 1970s was because residential properties are among the smallest in the world. More traditional boilers require one or more large tanks to be stored around the home to function.

A combi boiler is a self-contained unit that draws water from the mains then heats and distributes it instantly and on demand - no tanks are needed.

They are the most popular type of boilers in the UK and offer only one major disadvantage - there is a maximum volume of water that can be heated at any one time. If that limit is exceeded by, for example, two people using a hot water tap at the same time, there will be a drop in water pressure, temperature and volume to both taps.

Would the Vaillant EcoTEC Plus 938 combi be a suitable boiler for my house or flat?

You should make sure that the boiler you install in your property is the right "size". And, by size, we don't mean how big it is, we mean how powerful it is - the "output".

Your boiler has to be powerful enough to heat all the hot water you need for your radiators and taps. Power is measured in kilowatts and the more kilowatts a boiler has available to it, the more water it can heat.

If the output (measured in kilowatts) is too high, you'll have all the power you need and more but your gas bills will be much higher. If it's too low, you'll often find that the water coming out of your taps and fed into your radiators is only lukewarm.

With the Vaillant EcoTEC Plus 938 combi's output at 38.7 kW, which types of property would this Vaillant ecoTEC Plus 938 Combi boiler be most 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 Plus 938 Combi boiler would be larger properties including detached homes with 15 or more radiators and two or more bathrooms.

If you are considering installing a combi boiler in your home, you need to consider the flow rate as well as the output rate.

The flow rate is the volume of water (measured in litres per minute) that your boiler can instantly heat up and send around the home. The more demand in your home for water at the same time (for example, two people taking showers in different bathrooms), the higher the flow rate you'll need.

However, the actual flow rate your boiler can deliver is also determined by your mains water pressure. If you choose a boiler with a flow rate of 16l/m but the mains water pressure is 12l/m, your boiler will only perform to 12l/m. This Vaillant ecoTEC Plus 938 Combi boiler's flow rate is 16 L/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.


How big is the Vaillant EcoTEC Plus 938?

The Vaillant EcoTEC Plus 938 is 720 mm [H] by 440 mm [W] by 600 mm [D] in size.

Is the Vaillant EcoTEC Plus 938 condensing or non-condensing?

This Vaillant EcoTEC Plus 938 is a condensing gas boiler - we always recommend that clients choose the latest condensing models to benefit from the technology, which continues to improve year after year.

Condensing boilers capture the heat still present in flue exhaust gases and water vapour condensation, processing them through a secondary heat exchanger to, among other tasks, heat colder water returning from your radiators.

By selecting a modern condensing boiler, you'll save money on your gas bills as well as benefitting the wider environment.

How energy efficient is the Vaillant EcoTEC Plus 938 combi boiler?

Environmentally-friendly heating has become an important issue for homeowners concerned about the accelerating pace of climate change.

Gas boilers are responsible for dangerous atmospheric levels of nitrogen dioxide emissions in Britain's biggest cities and, overall, 14% of the UK’s greenhouse gases are produced by our domestic central heating systems.

If you decide to install a Vaillant EcoTEC Plus 938 combi in your home, will you be helping the environment with your choice? Let’s have a look at the figures.

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 Plus 938 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 Plus 938 is rated "A" for heat and "A" for water.

Does a Vaillant EcoTEC Plus 938 combi boiler come with a warranty period?

The parts and labour warranty on the Vaillant EcoTEC Plus 938 lasts for 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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