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Vaillant EcoTEC Plus 825 boiler

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Plumbproud rating

93.35%

Vaillant ecoTEC Plus 825 Combi Gas boiler

Considering lots of different factors such as price installed, manufacturer guarantees, energy efficiency, and the likely running cost, we’ve given this Vaillant ecoTEC Plus 825 Combi boiler a rating of 93.35% using our PlumbProud quality scoring system.

We estimate that this Vaillant ecoTEC Plus 825 Combi boiler will cost £2,300 fully installed through PlumbProud provided that the fit is straightforward.

To contact us, please enter your postcode in the quote boxes on this page, click here to email us, or give us a call on 01604 343053. We can provide you with a free quote on the Vaillant EcoTEC Plus 825 boiler and offer professional advice and guidance on whether this Vaillant ecoTEC Plus 825 Combi boiler is the right choice for your home.


Installed price around

£2,300

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Vaillant ecoTEC Plus 825 Combi Gas boiler frequently asked questions

What type of boiler is Vaillant’s EcoTEC Plus 825 - system, regular or combi?

You may wish to consider installing the Vaillant EcoTEC Plus 825 if you are looking for a combi boiler for your house or flat.

Traditional boilers would require you to install one or more storage tanks in your property. These tanks either kept the water warm or stored it for later heating. Manufacturers initially designed and introduced combi boilers to the market to offer homeowners the highest levels of warmth and unlimited hot water without taking up as much space.

Combi boilers provide hot water on demand for your radiators and taps. They take water directly from the mains, heat it immediately as it's needed, and then distribute the hot water around your home.

Combi boilers, however, are limited in terms of how much water they can heat at any given time. For example, if one person wishes to take a shower while another wants to turn on a hot water tap, the amount of water reaching each point drops. This results in a drop in the water pressure as well as the temperature.

Is a Vaillant EcoTEC Plus 825 combi the right boiler for my house or flat?

Whether this Vaillant ecoTEC Plus 825 Combi boiler is right for where you live depends on its size or "output" level. Size does not mean its physical dimensions - it means how powerful it is.

A boiler’s output is a measurement of the amount of power it can use to provide hot water to your taps and radiators. The higher its output rate, the more water it can heat.

If your new boiler’s output is too low, your hot water might not be as hot as you want it to be. If it's too high, you’ll be paying more for gas than you need to.

The output of the Vaillant EcoTEC Plus 825 combi boiler is 25.4 kW, so which types of property would this be appropriate for?

Most experienced boiler engineers would recommend this Vaillant ecoTEC Plus 825 Combi boiler as a suitable option for smaller homes and apartments with no more than up to 10 radiators and one bathroom.

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 Plus 825 Combi boiler's flow rate is 11 L/m.

However, combi boilers like the Vaillant EcoTEC Plus 825 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.


Dimensions of the Vaillant EcoTEC Plus 825 boiler

The Vaillant EcoTEC Plus 825 measures 720 mm high and 440 mm wide by a depth of 338 mm.

Is the Vaillant EcoTEC Plus 825 non-condensing or condensing?

Condensing gas boilers like the Vaillant EcoTEC Plus 825 are more energy-efficient and choosing one for your home will cut the amount you pay every year for your gas.

They do this by capturing the heat in water vapour condensation and in exhaust gases which would normally be expelled via the flue. They then recycle that heat, returning it to the system to, among other tasks, reheat colder water that is returning to your boiler from your radiators.

How does the Vaillant EcoTEC Plus 825 combi boiler rate environmentally?

Concern for the environment is causing more and more homeowners to think about how they heat their homes and its impact on climate change.

About 14% of the greenhouse gases we produce in the UK come from the power needed for central heating. In bigger British cities, gas boilers are a significant source of nitrogen dioxide emissions.

Would installing a Vaillant EcoTEC Plus 825 combi boiler in your home be a green choice? Let's look at the numbers.

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 Plus 825 is rated as 94% energy efficient, equivalent to a "A" SEDBUK rating.

The ERP (Energy Related Products Directive) is European legislation that aims to reduce the use of energy at all points during a product's life, from the point of manufacture to when it's in active use right through to final disposal.

The regulation aims is to encourage manufacturers to create products that are more environmentally friendly and which reduce the harmful gas emissions associated with those products.

The ERP gradings for the Vaillant EcoTEC Plus 825 are "A" for heat and "A" for hot water.

How long is the warranty period on the Vaillant EcoTEC Plus 825 combi boiler?

The Vaillant EcoTEC Plus 825 boiler comes with a 5 year warranty for parts and labour.


Vaillant ecoTEC Plus 825 Gas Combi boiler specifications

Powered by GasGas
LocationExternal
Condensing?Yes
Efficiency rating94%
Band ratingA
LPG Compatible?Yes
P/L Warranty5 Years
Output in kW25.4 kW
Height720 mm
Width440 mm
Depth338 mm
MountingWall
Flow rate11 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 825 Combi Gas boiler

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  2. Vaillant ecoTEC Plus 825
Plumbproud rating for this boiler
93.35%

We have determined a rating of 93.35% for this Vaillant ecoTEC Plus 825 Combi boiler using the PlumbProud quality benchmarking system. Factors used to score a boiler include its energy performance, how much it costs to run, the installation price, and how long the manufacturer's guarantee lasts.

We estimate that this Vaillant ecoTEC Plus 825 Combi boiler will cost £2,300 fully installed through PlumbProud provided that the fit is straightforward.

You can get more information and a free quote for the Vaillant EcoTEC Plus 825 boiler by entering your postcode in the quote boxes on this page, clicking here to email us, or by giving us a call on 01604 343053.


Installed price guideline
£2,300

Get your free quote

Vaillant ecoTEC Plus 825 Gas Combi boiler specifications

Powered by GasGas
LocationExternal
Condensing?Yes
Efficiency rating94%
Band ratingA
LPG Compatible?Yes
P/L Warranty5 Years
Output in kW25.4 kW
Height720 mm
Width440 mm
Depth338 mm
MountingWall
Flow rate11 L/m
ERP HeatA
ERP WaterA

Vaillant ecoTEC Plus 825 Combi Gas boiler frequently asked questions

Vaillant EcoTEC Plus 825 - a combi boiler, system boiler or regular boiler?

If you’re looking for a combi boiler for your house or flat, you may wish to the consider the Vaillant EcoTEC Plus 825.

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 a Vaillant EcoTEC Plus 825 combi boiler right 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 Plus 825 combi outputs at a maximum of 25.4 kW, so which types of property would this Vaillant ecoTEC Plus 825 Combi boiler be appropriate for?

An experienced PlumbProud Gas Safe engineer would almost certainly recommend that this Vaillant ecoTEC Plus 825 Combi boiler would be most suitable for smaller homes and apartments with up to 10 radiators and one bathroom.

With all combi boilers, you need to consider the "flow rate" as well as the output rate when making your decision.

Like all combi boilers, the Vaillant EcoTEC Plus 825 draws water from the mains. It instantly heats that water and then distributes it to the parts of your home which need it - taps, radiators, bathrooms, and so on. This Vaillant ecoTEC Plus 825 Combi boiler's flow rate is 11 L/m.

There is no benefit to purchasing a boiler with a high flow rate if the local water pressure is not that good - a high flow rate doesn't mean that your combi can draw more water from the mains.

In addition, if you live in a home with a large number of radiators and more than one bathroom and if more than one person regularly wants to use hot water at a time, a combi boiler may struggle to provide enough water at a hot enough temperature.

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.


Vaillant EcoTEC Plus 825 - size in millimetres

The Vaillant EcoTEC Plus 825 boiler measures 720 mm [H] x 440 mm [W] x 338 mm [D] in size.

Vaillant EcoTEC Plus 825 – condensing or non-condensing?

We always recommend to clients that they select the very latest condensing boiler for their home.

Condensing boilers like the Vaillant EcoTEC Plus 825 are more efficient with the gas they use in operation, meaning that you'll benefit from lower fuel bills. Condensing boilers are also better for the environment.

They achieve their efficiency by capturing and recycling the heat still present in the water vapour condensation and flue exhaust gases created when a boiler burns gas to get the energy it needs. It then reuses that recycled heat to perform a number of tasks, including heating the colder water that comes back to your boiler via the radiator.

How energy efficient is the Vaillant EcoTEC Plus 825 combi boiler?

Concern for the environment is causing more and more homeowners to think about how they heat their homes and its impact on climate change.

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.

Will installing a Vaillant EcoTEC Plus 825 combi in your home be a positive contribution to the environment? The figures below will tell you more.

An energy efficiency rating of 92% or above is a legal requirement for all boilers manufactured and installed in the UK today. 92% is equivalent to a low-to-middle "A" grade on the "Seasonal Efficiency of Domestic Boilers" (SEDBUK) scale.

Energy efficiency measures how much energy a boiler uses and wastes in the course of its normal operation. The lower the waste, the lower your gas bills.

The Vaillant EcoTEC Plus 825 was awarded an efficiency rating of "94%", equivalent to a "A" rating on the SEDBUK system.

The Energy Related Products Directive intends to encourage all manufacturers to reduce the harmful gas emissions associated with the products they make, from the manufacturing stage to final disposal, including when they are in active use.

The Vaillant EcoTEC Plus 825 has an ERP rating of "A" for heat and "A" for hot water.

How long am I covered by the warranty for if the Vaillant EcoTEC Plus 825 breaks down?

The Vaillant EcoTEC Plus 825 boiler comes 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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