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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 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.

This Viessmann Vitodens 100-W 26kW Combi boiler will cost approximately £2,200 supplied and fully installed through PlumbProud assuming that there are no unexpected complications during the fitting.

Get a free, no-obligation Viessmann Vitodens 100-W 26kW boiler quote today by simply entering your postcode in the box on this page. You can also speak to a boiler installation expert about heating for your home by getting in touch via email or by phone on 01604 343053.


Installed price around

£2,200

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

Is the Viessmann Vitodens 100-W 26kW a combi, system or regular 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.

Traditional boilers have one or more large tanks in which they store either heated water or water to be heated later. Manufacturers originally introduced combi boilers to the market in the 1970s to enable homeowners to save space - UK residential properties are among the smallest in the Western world.

Combi boilers don't need these tanks because they draw water directly from the mains and instantly heat it on demand thanks to the technology inside the boiler. Combi boilers then distribute this hot water to your home’s taps and radiators when needed.

The most significant disadvantage of combi boilers is that they are not ideal in larger homes where multiple people might want hot water at the same time – for example, if someone is having a shower while another wants to wash dishes in the kitchen. This is because combi boilers have a maximum volume of water that they can heat. When two people want hot water at the same time, the water temperature, pressure and volume delivered to both points drop.

Is a Viessmann Vitodens 100-W 26kW combi boiler suitable for my house or flat?

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?

To most experienced Gas Safe engineers, the Viessmann Vitodens 100-W 26kW combi Vitodens 100-W would be most suitable for smaller homes and apartments with up to 10 radiators and one bathroom.

If you are thinking about installing a combi boiler like the Viessmann Vitodens 100-W 26kW in your home, you should consider flow rates as well as output rates. This Viessmann Vitodens 100-W 26kW Combi boiler's flow rate is 12 L/m.

The flow rate indicates the maximum volume of water (measured in litres per minute) that your boiler can heat up and send to your radiators, taps and showers at any one time. The more taps and showers that could be in use simultaneously or the greater the number of radiators you have, the higher the flow rate you need.

However, you should establish what the mains pressure is at your property as a combi boiler can only heat the water that comes into your home.

For example, 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 capacity. Typically, a power shower will require 10 litres of water per minute.

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.


Making space for the Viessmann Vitodens 100-W 26kW

The Viessmann Vitodens 100-W 26kW boiler is 455 mm high, 595 mm wide, and 800 mm deep.

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

The Viessmann Vitodens 100-W 26kW 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.

How does the Viessmann Vitodens 100-W 26kW combi boiler rate environmentally?

Many homeowners are becoming increasingly concerned about how they heat their homes and the impact it has on climate change and other important environmental issues.

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.

Do the available figures suggest that installing the Viessmann Vitodens 100-W 26kW combi in your property would be an environmentally friendly choice?

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

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 Viessmann Vitodens 100-W 26kW has a rating of "A" for heat and "A" for hot water production.

How long am I covered by the warranty for if the Viessmann Vitodens 100-W 26kW breaks down?

The Viessmann Vitodens 100-W 26kW boiler comes with a parts and labour warranty of 5 years.


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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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%

Using the PlumbProud boiler quality scoring system, we have rated this model at 90.96%. To determine the rating, we factor in the price installed, energy efficiency, running costs, the warranty offered, and more.

This Viessmann Vitodens 100-W 26kW Combi boiler is likely to cost you £2,200 supplied and fully installed through PlumbProud, although there may be additional charges if the fit takes longer than anticipated. You will, however, receive a binding quote from us prior to starting work.

If you would like to get in touch with us for a free quote and professional guidance and advice on whether the Viessmann Vitodens 100-W 26kW is the right choice for your home, you can do so by entering your postcode in the quote boxes on this page, calling us on 01604 343053 or you can click here to email us.


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

What type of boiler is the Viessmann Vitodens 100-W 26kW - regular, system or combi?

If you’re looking for a combi boiler for your house or flat, you may wish to the consider the Viessmann Vitodens 100-W 26kW.

Traditionally, boilers needed one or more large tanks installed in your property to store their heated water or water that was to be heated later. These tanks were often too large to be practical for most homes so the combi boiler was introduced to Britain in the 1970s by manufacturers to help homeowners overcome this issue.

Instead of using tanks as storage, a combi boiler heats water on demand. It draws water from the mains and heats it instantly on demand before distributing it to wherever it is needed in a property, be it your taps or radiators.

Unfortunately, combi boilers have one main disadvantage for larger properties or larger households. Because they have a maximum volume of water that can be heated on demand at any given time, water pressure, volume and temperature will drop if, for example, someone is taking a shower and another person in your home wants to use a hot water tap at the same time.

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 - its "output".

The output rate tells you how much energy your boiler has to use to provide you and your family with hot water and central heating. A higher output rate means that it can heat greater volumes of water.

Please be aware, though - if you choose a boiler whose output is too low, the water in your radiators and coming from your taps may not be warm enough. Conversely, if you choose a boiler with too high an output, you'll pay more for gas than is necessary.

The Viessmann Vitodens 100-W 26kW combi boiler has an output level of 26 kW, so which types of property would it 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.

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


What are the dimensions of the Viessmann Vitodens 100-W 26kW boiler?

The Viessmann Vitodens 100-W 26kW is 455 mm high by 595 mm wide by 800 mm deep.

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

The Viessmann Vitodens 100-W 26kW boiler is a condensing gas boiler and we recommend that you select one of the latest models if possible.

Condensing boilers reduce homeowners' gas bills and are better for the environment. They do this by capturing and recycling the heat still present in the flue exhaust gases and water vapour condensation produced when boilers burn gas to generate the power they need to operate.

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

How we heat our homes has become a major issue for many people worried about climate change and environmental issues in general.

Central heating systems are responsible for 14% of greenhouse gas emissions in the UK. You may also be aware that the gas boilers we use emit dangerous nitrogen dioxide in large volumes in the bigger British cities.

Do the figures suggest that installing the Viessmann Vitodens 100-W 26kW combi at your property would help in the fight against climate change?

All new British boilers must perform to a legal minimum energy efficiency of 92% (a low to good SEDBUK "A" rating). Prior to April 2018, the target was 88% (86-90% = SEDBUK "B" and 90%+ = SEDBUK "A").

Efficiency ratings are intended to let consumers know how much energy a boiler uses in its day-to-day activities and how much energy goes to waste.

The Viessmann Vitodens 100-W 26kW was awarded an efficiency rating of 94%, equivalent to a SEDBUK grade of "A".

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 Viessmann Vitodens 100-W 26kW has an ERP Heat rating of "A" and an ERP Water rating of "A".

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

You receive a parts and labour warranty of 5 years with the Viessmann Vitodens 100-W 26kW boiler.


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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