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Viessmann Vitodens 100 W 35kW boiler

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Plumbproud rating

89.70%

Viessmann Vitodens 100-W 35kW heat only Gas boiler

We have rated this Viessmann Vitodens 100-W 35kW heat only boiler at 89.70% using the PlumbProud quality scoring system. To determine a rating, we weigh up a number of important considerations including the energy efficiency, estimated running costs, manufacturer's warranty, price of the boiler and more.

This Viessmann Vitodens 100-W 35kW heat only boiler is likely to cost around £2,500 fully installed by PlumbProud if there are no unexpected complications during the fit.

Get a free, no-obligation Viessmann Vitodens 100-W 35kW 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

£2,500

GET A COMPETITIVE BOILER QUOTE

Please enter your postcode below to get a personalised quotation for the perfect boiler for your home

Viessmann Vitodens 100-W 35kW heat only Gas boiler frequently asked questions

Is the Viessmann Vitodens 100-W 35kW a combi, system or regular boiler?

The Viessmann Vitodens 100-W 35kW boiler is an option you may wish to consider if you're looking for a heat only boiler for your house or flat.

Heat only boilers (sometimes called conventional boilers, standard boilers or regular boilers) need both a hot water cylinder with an immersion heater and a cold-water tank to work. The cold water tank (normally found in an attic or a loft) passes water when required to the hot water cylinder (normally found in a landing or airing cupboard), which heats the water and keeps it warm.

When you set the times you want for your hot water and central heating, the hot water for your taps, showers, baths and radiators is drawn from the hot water cylinder. Bear in mind though that, if you forget to program the system and the hot water cylinder is empty, you may have to wait up to an hour for your hot water.

A heat only boiler is usually the recommended option for families or properties with multiple bathrooms. This is because, unlike combi boilers which can only effectively provide for one outlet at a time without a drop in water pressure, volume or temperature, standard boilers can handle demand from multiple points around the home at once.

Is the Viessmann Vitodens 100-W 35kW heat only boiler the right choice for my house or apartment?

Selecting the right boiler for your home means choosing 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".

Your boiler’s output is a measurement of the power it has available to it to heat the water you need for your radiators or for when you turn on a tap, bath or shower. A higher output rate means it has more power and can heat more water.

It's important to choose an output that matches the demand for water in your home because if your boiler has too low an output, you'll often find only lukewarm water comes out of your taps or heats your radiators. If it’s too high, you’ll be paying more for your gas than you need to.

The Viessmann Vitodens 100-W 35kW heat only has an output of 35 kW, so which types of property would this Viessmann Vitodens 100-W 35kW heat only boiler be appropriate for?

An experienced PlumbProud Gas Safe boiler installer would likely recommend that this Viessmann Vitodens 100-W 35kW heat only boiler would be suitable for larger properties including detached homes with 15 or more radiators and two or more bathrooms.


The dimensions of the Viessmann Vitodens 100-W 35kW are

The Viessmann Vitodens 100-W 35kW is 600 mm [H] by 375 mm [W] by 340 mm [D] in size.

Is the Viessmann Vitodens 100-W 35kW non-condensing or condensing?

Condensing gas boilers like the Viessmann Vitodens 100-W 35kW are environmentally friendlier and cheaper to run so, if possible, we strongly recommend that you choose this or one of the very latest models.

Condensing boilers are much more efficient and economical to run because they contain a secondary heat exchanger that captures and recycles the warmth still present in the flue exhaust gases and the water vapour condensation for re-use, meaning that they use less gas to run.

How environmentally friendly is the Viessmann Vitodens 100-W 35kW heat only?

How we heat our homes and the damage we might be doing to the environment as a result has become an important point of concern to many homeowners worried about climate change.

In the UK, central heating is responsible for 14% of greenhouse gas production. Domestic gas boilers emit large quantities of nitrogen dioxide in British cities.

Would choosing a Viessmann Vitodens 100-W 35kW heat only help the environment? Let’s see what the performance figures suggest.

The Viessmann Vitodens 100-W 35kW has been awarded an efficiency rating of 94% and a SEDBUK band rating of "A".

In the UK, all boilers manufactured and supplied must have an energy efficiency rating of at least 92% or a SEDBUK "A" grade. Until April 2018, the minimum rating was 88% (88% and 89% are equivalent to a SEDBUK "B" rating and anything higher is rated "A").

A boiler's energy efficiency rating describes the amount of energy it uses and wastes when in normal operation.

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, and right through to the point of final disposal.

The Viessmann Vitodens 100-W 35kW has a rating of "A" .

If the Viessmann Vitodens 100-W 35kW heat only boiler breaks down, am I covered?

A parts and labour warranty of 5 years is included when you purchase the Viessmann Vitodens 100-W 35kW boiler through PlumbProud.


Viessmann Vitodens 100-W 35kW Gas heat only boiler specifications

Powered by GasGas
LocationExternal
Condensing?Yes
Efficiency rating94%
Band ratingA
LPG Compatible?Yes
P/L Warranty5 Years
Output in kW35 kW
Height600 mm
Width375 mm
Depth340 mm
MountingWall
ERP HeatA

The top 10 rated Gas heat only boilers

Using the Plumbproud scoring system, the current 10 ten Gas heat only boilers assessed using a number of important variables are as follows:

1Vaillant ecoTEC Plus 41596.51%
2Vaillant ecoTEC Plus 41895.45%
3Vaillant ecoFIT Pure 41294.82%
4Vaillant ecoTEC Plus 42494.77%
5Vaillant ecoFIT Pure 41594.23%
6Vaillant ecoTEC Plus 43094.23%
7Worcester Bosch Greenstar Ri 12Ri94.18%
8Worcester Bosch Greenstar Ri 15Ri93.93%
9Worcester Bosch Greenstar Ri 18Ri93.26%
10Vaillant ecoFIT Pure 41893.11%

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Viessmann Vitodens 100 W 35kW boiler

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Viessmann Vitodens 100-W 35kW heat only Gas boiler

  1. Home
  2. Viessmann Vitodens 100-W 35kW
Plumbproud rating for this boiler
89.70%

We have determined a rating of 89.70% for this Viessmann Vitodens 100-W 35kW heat only 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 would expect that, unless there are complications during fitting, this Viessmann Vitodens 100-W 35kW heat only boiler would cost £2,500 supplied and professionally installed through PlumbProud.

Get a free, no-obligation Viessmann Vitodens 100-W 35kW 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 guideline
£2,500

Get your free quote

Viessmann Vitodens 100-W 35kW Gas heat only boiler specifications

Powered by GasGas
LocationExternal
Condensing?Yes
Efficiency rating94%
Band ratingA
LPG Compatible?Yes
P/L Warranty5 Years
Output in kW35 kW
Height600 mm
Width375 mm
Depth340 mm
MountingWall
ERP HeatA

Viessmann Vitodens 100-W 35kW heat only Gas boiler frequently asked questions

Is the Viessmann Vitodens 100-W 35kW a standard, combi or system boiler?

The Viessmann Vitodens 100-W 35kW boiler could be suitable for your house or flat if you are looking for a new heat only boiler.

Heat only boilers (often referred to as conventional boilers, standard boilers or regular boilers) consist of a large cold water tank, hot water cylinder with an immersion heater, and a control panel. The cold water tank is often situated in a loft or attic while the hot water cylinder tends to be located in an airing or landing cupboard.

The major advantage of a heat only boiler compared to the more contemporary combi boiler is that it’s possible to run more than one appliance requiring hot water at the same time. With a combi boiler, switching two hot water taps on at the same time will lead to a drop in water pressure, temperature and volume to both points.

Best suited for larger homes, you can program hot water and central heating for times and days that suit you and your family. However, if you forget to set the timer and your hot water cylinder is empty, then you may have to wait up to an hour before you run a bath.

Is a Viessmann Vitodens 100-W 35kW heat only the right boiler for my house or flat?

Whether this Viessmann Vitodens 100-W 35kW heat only boiler is right for where you live depends on its size or "output" level. Size does not mean its physical dimensions, however - it means how powerful it is.

Measured in kilowatts, a boiler's output level is an indication of the amount of power it has available to it to heat the water coming from your taps and for warming your radiators. The greater the output level, the more water it can heat.

If you choose a boiler whose output level is too low, you'll often find that the water is not as hot as you want it to be. If you choose a boiler whose level is too high, you'll be paying higher gas bills than you need to for years to come.

The output of the Viessmann Vitodens 100-W 35kW heat only is 35 kW, so which types of property is this Viessmann Vitodens 100-W 35kW heat only boiler appropriate for?

A Gas Safe engineer would recommend that the Viessmann Vitodens 100-W 35kW heat only boiler would be an ideal installation option for larger properties including detached homes with 15 or more radiators and two or more bathrooms.


What are the dimensions of the Viessmann Vitodens 100-W 35kW boiler?

The dimensions of the Viessmann Vitodens 100-W 35kW are 600 mm tall, 375 mm wide, and 340 mm deep.

Is the Viessmann Vitodens 100-W 35kW condensing or non-condensing?

The Viessmann Vitodens 100-W 35kW is a condensing gas boiler - we strongly suggest that you choose either this model or a recently released model if at all possible.

A condensing boiler captures and recycles the warmth present in flue exhaust gases and water vapour condensation created by the burning of gas to warm up the water coming back into your boiler - for example, from your radiators.

Condensing boilers cost less to run (lower gas bills) and are better for the environment.

Is the Viessmann Vitodens 100-W 35kW heat only boiler good for the environment?

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

Nitrogen dioxide emissions in Britain's largest cities are at dangerous levels and this has been caused by gas boilers. In fact, 14% of the UK’s greenhouse gases are produced by central heating.

If you would like your next boiler to help in the fight against climate change, would the Viessmann Vitodens 100-W 35kW heat only be a suitable 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 35kW was given an efficiency rating of 94% and a SEDBUK grading of "A".

In 2015, new legislation was introduced by the EU to encourage manufacturers to develop more energy-efficient products that emit fewer harmful gases throughout their lifetime.

The Energy Related Products Directive (ERP) applies to all products that consume energy, including during the manufacturing process, at the point of final disposal, and all points in between.

The ERP rating of the Viessmann Vitodens 100-W 35kW is "A".

How long am I covered by the warranty for if the Viessmann Vitodens 100-W 35kW breaks down?

The Viessmann Vitodens 100-W 35kW boiler is covered by a parts and labour warranty of 5 years.


The top 10 rated Gas heat only boilers

Using the Plumbproud scoring system, the current 10 ten Gas heat only boilers assessed using a number of important variables are as follows:

1Vaillant ecoTEC Plus 41596.51%
2Vaillant ecoTEC Plus 41895.45%
3Vaillant ecoFIT Pure 41294.82%
4Vaillant ecoTEC Plus 42494.77%
5Vaillant ecoFIT Pure 41594.23%
6Vaillant ecoTEC Plus 43094.23%
7Worcester Bosch Greenstar Ri 12Ri94.18%
8Worcester Bosch Greenstar Ri 15Ri93.93%
9Worcester Bosch Greenstar Ri 18Ri93.26%
10Vaillant ecoFIT Pure 41893.11%
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