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Vaillant EcoTEC Plus 825 boiler

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Plumbproud rating

93.35%

Vaillant ecoTEC Plus 825 Combi Gas boiler

Based on a wide-ranging set of important factors including the cost to install the boiler, its energy efficiency rating, running costs, and so on, this Vaillant ecoTEC Plus 825 Combi boiler receives a score of 93.35% on our PlumbProud quality scoring system.

On a straightforward installation of this make of boiler using PlumbProud, you should expect to budget around £2,300.

For a free, no-obligation quotation on this Vaillant ecoTEC Plus 825 Combi boiler or for our professional advice on whether the Vaillant EcoTEC Plus 825 is suitable for your property, please call 01604 343053, click here to email our team or enter your postcode into the quotation box on this page.


Installed price around

£2,300

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Vaillant ecoTEC Plus 825 Combi Gas boiler frequently asked questions

Which category of boiler does the Vaillant EcoTEC Plus 825 fit into?

If you want a combi boiler for your flat or house, the Vaillant EcoTEC Plus 825 might be an option for you to consider.

Combi boilers provide hot water or heating for your home on demand. You just need to turn the tap to get hot water or switch on the radiator and you’ll feel your home warm up within minutes.

In contrast, traditional boilers required either one or two large storage tanks to work - one to heat and keep water warm and the other to hold cold water for later heating. If the immersion tank was empty, it wasn’t uncommon to wait up to an hour for enough hot water to fill a bath, for example.

Combi boilers draw cold water from the mains and then heat it instantly whenever it's needed, all from one small unit.

The one disadvantage to combi boilers is that, if more than one point is in use at any one time (for example, if someone is taking a shower and another person turns on a hot water tap elsewhere in the property), water pressure, temperature and volume drop to both points.

Would the Vaillant EcoTEC Plus 825 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 size doesn't mean its physical dimensions, size means how much power it has - the "output".

Your boiler should be able to cope with peak hot water demand in your property and not just your average hot water usage. The output rate of a boiler is measured in kilowatts and tells you how much power a boiler can use to provide hot water to your taps, showers and radiators.

If the output of your boiler is too low, there will often be times when your water isn't as hot as you want. But if your boiler output is too high, it will be more costly to run (often unnecessarily).

The output of the Vaillant EcoTEC Plus 825 combi boiler is 25.4 kW kilowatts. Which types of property would this be appropriate for?

To most experienced Gas Safe engineers, the Vaillant EcoTEC Plus 825 combi EcoTEC Plus would be most suitable for smaller homes and apartments with up to 10 radiators and one bathroom.

Flow rates are important when choosing a combi boiler as well as output rates.

A combi boiler's flow rate (measured in litres per minute) describes how much water it can instantly heat then distribute to the taps and radiators in your home - you will need to factor this into your decision on a new combi boiler. This Vaillant ecoTEC Plus 825 Combi boiler's flow rate is 11 L/m.

If you have a lot of radiators and bathrooms in your home and there's lots of demand within your household for hot water at the same time (like morning or evening showers and baths), you'll need a boiler with a high flow rate.

However, it's not quite that simple. If your local mains water pressure is low, you're not going to gain any benefit from choosing a combi boiler with a high flow rate because that higher flow rate 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 big is the Vaillant EcoTEC Plus 825?

The dimensions of the Vaillant EcoTEC Plus 825 are 720 mm tall, 440 mm wide, and 338 mm deep.

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

The Vaillant EcoTEC Plus 825 is a condensing gas boiler - we’d strongly recommend that you choose the very latest condensing model for your home.

Condensing boilers run on either gas or oil and are manufactured specifically to improve energy efficiency. They do this by capturing and recycling the warmth present in flue exhaust gases and water vapour condensation into more usable heat the system can use, meaning they're far more efficient and cost less to run.

Is the Vaillant EcoTEC Plus 825 combi boiler environmentally friendly?

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.

Central heating accounts for 14% of greenhouse gas emissions in the UK. In larger British cities, gas boilers emit dangerous levels of nitrogen dioxide into the atmosphere.

Would choosing the Vaillant EcoTEC Plus 825 combi boiler be an environmentally friendly decision? Here's what the figures say.

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 825 has an efficiency rating of 94% with a SEDBUK grade of "A".

The Energy Related Products (ERP) directive is Europe-wide legislation designed to reduce harmful gas emissions at all points of a product's life cycle - from the production process to its actual end use, right through to final disposal.

The Vaillant EcoTEC Plus 825 has a rating of "A" for heat and "A" for water.

Is there a warranty on the Vaillant EcoTEC Plus 825 combi boiler if it breaks down?

The parts and labour warranty on the Vaillant EcoTEC Plus 825 lasts for 5 years.


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 boiler

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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%

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 Plus 825 Combi boiler scores 93.35%.

On straightforward installations, we would expect to charge you £2,300 for this Vaillant ecoTEC Plus 825 Combi boiler fully installed.

To receive a free quote on the Vaillant EcoTEC Plus 825 boiler and to receive professional advice and guidance on whether it's the right choice for your home, please enter your postcode in the quote boxes on this page, click here to email us, or call 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 system boiler, regular boiler or combi boiler?

Looking for a gas combi boiler for your house or flat? If you are, the Vaillant EcoTEC Plus 825 boiler may be worth considering.

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 825 combi boiler from the EcoTEC Plus range a suitable choice 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.

Boiler output is measured in kilowatts and tells you how much power a boiler can use to heat the water your taps, showers and radiators need. The higher the output, the more power it has.

When choosing a boiler, you should choose one that can cope with the peak demand for hot water in your home and not just your typical usage.

If its output is too low, sometimes your hot water will not be hot enough, but if your boiler's output is too high for your needs, your gas bills will go up and not down.

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

A boiler engineer would recommend that, at this level of output, the most suitable type of property for this Vaillant ecoTEC Plus 825 Combi boiler would be 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.


What size is a Vaillant EcoTEC Plus 825 boiler?

The Vaillant EcoTEC Plus 825 occupies a space of 720 mm high by 440 mm wide and 338 mm deep.

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

The Vaillant EcoTEC Plus 825 is a condensing boiler – we recommend to all clients that they choose the very latest condensing boilers because their efficiency continues to improve year after year.

Condensing boilers recycle heat from both water vapour condensation and flue exhaust gases via a secondary heat exchanger. With this heat, it performs other tasks like warming up colder water returning from your radiator without having to use more gas.

You will save money on your gas bills every year by choosing a condensing boiler as well as benefitting the environment.

Is the Vaillant EcoTEC Plus 825 combi rated as environmentally friendly?

With environmental issues in the spotlight, more and more homeowners are becoming concerned about how they heat their homes and how much they're contributing towards combatting climate change.

Approximately 14% of the UK's greenhouse gas production is caused by our central heating systems. The gas boilers in larger urban areas of Britain are mainly responsible for emissions of toxic nitrogen dioxide.

Would the environmental impact of installing a Vaillant EcoTEC Plus 825 combi in your home be positive? Let's look at the numbers.

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 (ERP) came into force in 2015. This legislation was introduced to encourage manufacturers to create more energy-efficient products and it covers all products that consume energy during their lifetimes, including energy used during production and at the point of disposal.

ERP ratings of "A" for heat and "A" for water were assigned when testing the Vaillant EcoTEC Plus 825.

Is there a warranty on the Vaillant EcoTEC Plus 825 combi boiler if it breaks down?

A parts and labour warranty of 5 years is included when you purchase the Vaillant EcoTEC Plus 825 boiler through PlumbProud.


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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