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Viessmann Vitodens 100 W 26kW boiler

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Plumbproud rating

90.96%

Viessmann Vitodens 100-W 26kW Combi Gas boiler

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 Viessmann Vitodens 100-W 26kW Combi boiler, we have awarded a rating of 90.96%.

Provided the proposed installation is straightforward, we would anticipate that this Viessmann Vitodens 100-W 26kW Combi boiler will cost £2,200 fully installed through PlumbProud.

To receive a free quote on the Viessmann Vitodens 100-W 26kW boiler, as well as professional advice on whether it will meet the needs of your home, simply enter your postcode in the quote box on this page, click here to email us, or call 01604 343053.


Installed price around

£2,200

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Viessmann Vitodens 100-W 26kW Combi Gas boiler frequently asked questions

Viessmann Vitodens 100-W 26kW - a regular boiler, combi boiler or system boiler?

The Viessmann Vitodens 100-W 26kW boiler could be suitable for your house or flat if you are looking for a new combi boiler.

Traditional boilers need one or more large tanks to work - one to heat and keep water warm for immediate use and the other to store water intended for heating later. Finding space for these large tanks is difficult in British residential property - remember that our houses and flats are among the smallest in the world. This is the problem that combi boilers were designed to solve when they were introduced in the 1970s.

Combi boilers don't need a tank - instead, they instantly heat water drawn from the mains using technology inside the boiler. This hot water is then distributed immediately to your taps or radiators on demand.

The biggest disadvantage to combi boilers is that they have a maximum capacity for heating water, meaning that they work best when only one point within a household wants hot water. For example, if someone is taking a shower and another person uses a hot water tap at the same time, the water pressure, volume and temperature to both points drops.

Should I install a Viessmann Vitodens 100-W 26kW combi boiler in 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 Viessmann Vitodens 100-W 26kW combi is 26 kW kilowatts, so which types of property would this be appropriate for?

An experienced heating engineer would say that this Viessmann Vitodens 100-W 26kW Combi boiler's level of output makes it a suitable installation for smaller homes and apartments with up to 10 radiators and one bathroom.

Please remember to consider "flow rates" as well when choosing your new boiler. All combi boilers including the Viessmann Vitodens 100-W 26kW draw water from the mains.

Each combi boiler has its own flow rate (measured in litres per minute) - this tells you how much water it can heat and distribute to your home’s taps and radiators straight from the mains. This Viessmann Vitodens 100-W 26kW Combi boiler's flow rate is 12 L/m.

There is no benefit to you in choosing a combi with a high flow rate if your mains pressure is low - save money by buying a boiler whose flow rate is equal to or slightly more than the pressure in your water pipes.

In addition, if you have a lot of radiators and bathrooms in your home or you have a large household that often uses lots of hot water at the same time, like for regular morning and evening showers, a combi boiler may not be suitable.

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 Viessmann Vitodens 100-W 26kW?

Viessmann’s Vitodens 100-W 26kW is 455 mm tall, 595 mm wide, and 800 mm deep.

Viessmann Vitodens 100-W 26kW – condensing or non-condensing?

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 Viessmann Vitodens 100-W 26kW 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 Viessmann Vitodens 100-W 26kW combi boiler rated as 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 creates 14% of the UK’s greenhouse gases. And in Britain's larger cities, gas boilers are responsible for dangerous levels of nitrogen dioxide emissions.

Would installing a Viessmann Vitodens 100-W 26kW combi boiler in your home be a green choice? Let's look at the numbers.

Boilers manufactured and installed in the UK are assigned energy efficiency ratings following testing to an agreed set of standards. These scores indicate how much energy the boiler uses and how much goes to waste when it's in operation.

By law, boilers must achieve a SEDBUK rating of "A" subject to achieving a minimum of 92% energy efficiency. Prior to April 2018, the minimum was 88% (88% and 89% on the SEDBUK are graded "B" and 90% and above is graded "A").

The Viessmann Vitodens 100-W 26kW was awarded an efficiency rating of 94% with a SEDBUK band rating of "A".

The ERP (or Energy Related Products Directive) is a European regulation governing products which require energy to operate throughout their lives and encourages manufacturers to create products that are more environmentally friendly.

The legislation is designed to reduce the potential for harmful gas emissions during manufacturing and actual use right through to the point of final disposal.

For the Viessmann Vitodens 100-W 26kW, the ERP rating is "A" for heat and "A" for hot water production.

How long is the warranty period on the Viessmann Vitodens 100-W 26kW combi boiler?

A parts and labour warranty of 5 years is included with the Viessmann Viessmann Vitodens 100-W 26kW boiler.


Viessmann Vitodens 100-W 26kW Gas Combi boiler specifications

Powered by GasGas
LocationExternal
Condensing?Yes
Efficiency rating94%
Band ratingA
LPG Compatible?Yes
P/L Warranty5 Years
Output in kW26 kW
Height455 mm
Width595 mm
Depth800 mm
MountingWall
Flow rate12 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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The ideal boiler perfect for the largest homes

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Viessmann Vitodens 100 W 26kW boiler

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Viessmann Vitodens 100-W 26kW Combi Gas boiler

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  2. Viessmann Vitodens 100-W 26kW
Plumbproud rating for this boiler
90.96%

We scored this Viessmann Vitodens 100-W 26kW Combi boiler at 90.96% on our internal benchmarking system. To determine a score, we take into consideration a number of different factors including the boiler's energy efficiency, installed price, likely running costs, and the length of the manufacturer's warranty.

We would expect that, unless there are complications during fitting, this Viessmann Vitodens 100-W 26kW Combi boiler would cost £2,200 supplied and professionally installed through PlumbProud.

You can get more information and a free quote for the Viessmann Vitodens 100-W 26kW 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
£2,200

Get your free quote

Viessmann Vitodens 100-W 26kW Gas Combi boiler specifications

Powered by GasGas
LocationExternal
Condensing?Yes
Efficiency rating94%
Band ratingA
LPG Compatible?Yes
P/L Warranty5 Years
Output in kW26 kW
Height455 mm
Width595 mm
Depth800 mm
MountingWall
Flow rate12 L/m
ERP HeatA
ERP WaterA

Viessmann Vitodens 100-W 26kW Combi Gas boiler frequently asked questions

Viessmann Vitodens 100-W 26kW - a regular boiler, combi boiler or system boiler?

If you are searching for a combi boiler for your house or flat, the Viessmann Vitodens 100-W 26kW is certainly one to consider.

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 Viessmann Vitodens 100-W 26kW combi boiler suitable for my house or apartment?

Whether this Viessmann Vitodens 100-W 26kW Combi boiler is right for where you live depends on its size or what its "output" level is. Size does not mean its physical dimensions, however - it means how powerful it is.

The output of a boiler is measured in kilowatts and indicates how much energy it can use to heat the water needed for your radiators, taps and showers. The greater the output, the more water it can heat.

A boiler whose output is too high will give you hot water and warm radiators but also higher gas bills, whereas a boiler whose output is too low will result in cheaper gas bills but the water might not always be as hot as you want it to be.

The output of the Viessmann Vitodens 100-W 26kW combi is 26 kW, so which types of property would this model be appropriate for?

Most heating engineers would suggest that the Viessmann Vitodens 100-W 26kW combi boiler would be a suitable choice for installation in smaller homes and apartments with up to 10 radiators and one bathroom.

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 Viessmann Vitodens 100-W 26kW Combi boiler's flow rate is 12 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 Viessmann Vitodens 100-W 26kW boiler

The Viessmann Vitodens 100-W 26kW measures 455 mm tall, 595 mm wide, and 800 mm deep.

Is the Viessmann Vitodens 100-W 26kW condensing or non-condensing?

The Viessmann Vitodens 100-W 26kW is a condensing gas boiler - in fact, we recommend that you select this model or one of the latest condensing boilers on the market as the technology continues to improve over time.

Condensing boilers capture the heat still present in the flue exhaust gases and water vapour condensation created when the gas is burned and they recycle this back into the heating system to warm up the cold water re-entering the boiler from your radiators.

They're much more environmentally friendly and installing one results in much lower annual gas bills.

Is the Viessmann Vitodens 100-W 26kW combi an environmentally friendly boiler?

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.

In the UK, central heating systems account for 14% of greenhouse gas production. Gas boilers in particular are responsible for emissions of dangerous nitrogen dioxide in British cities.

Would installing a Viessmann Vitodens 100-W 26kW combi boiler in your home be a green choice? Let's look at the numbers.

All boilers manufactured and installed in the UK are required by law to have an energy efficiency rating of at least 92%, equivalent to a good “A” rating on the SEDBUK scale. Before this, the minimum was 88% (ratings of 88% and 89% are equivalent to a high “B” SEDBUK rating and anything 90% or higher is an "A" rating).

A boiler's energy efficiency rating is designed to let you know how much energy is used and wasted during normal functioning.

The Viessmann Vitodens 100-W 26kW was given an efficiency rating of 94% and a band rating of "A".

The Energy Related Products (ERP) Directive is important European legislation that aims to limit energy use and harmful gas emissions during the manufacturing process, when the product is in use, and after it is disposed of.

For the Viessmann Vitodens 100-W 26kW, the ERP Heat rating is "A" and the ERP Water rating is "A".

How long is the warranty offered by the manufacturer for the Viessmann Vitodens 100-W 26kW boiler?

The parts and labour warranty on the Viessmann Vitodens 100-W 26kW covers all repair-related costs for 5 years while the heat exchange warranty covers you for [Heat Exchange Warranty] 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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