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 4.8 stars

1,929 reviews

 4.8 stars

1,929 reviews

Viessmann Vitodens 100-W 35kW Combi Gas Boiler

Viessmann Vitodens 100-W 35kW Combi Gas Boiler Boiler
Typical Price (inc VAT)
£1,500
Typical installation Cost (inc VAT)*
£500 - £1000
Sundries (Filter, Flue, etc)
£300
Total Cost
£2,300 - £2,800
Make Viessmann
Model Vitodens 100-W 35kW Combi Gas Boiler
Is Condensing Condensing
Efficiency Rating 98%
Band Rating A Rated
LPG Compatible Yes
Standard Warranty 5 years, can be extended to 12 years
Central Heating Max. Output 32kW
Mounting Wall-mounted
Flow Rate 17 l/min
Typical Price (inc VAT) £1,500
Typical installation Cost (inc VAT)* £500 - £1000
Sundries (Filter, Flue, etc) £300
Total Cost £2,300 - £2,800
ERP Rating A Heat A Hot Water
Hot Water Max. Output 34.9kW

* This is a guide price for a straightforward, like-for-like boiler replacement. Installation costs will vary dependent on work required.

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Viessmann Vitodens 100-W 35kW combi gas boiler at a glance

  • - Suitable for: medium-sized properties with up to 15 radiators and 1-2 bathrooms
  • - Fuel: Gas. Also compatible with LPG. Certified to run on a 20% hydrogen blend
  • - Type: Combi / Condensing
  • - Central Heating (CH) output: 32kW
  • - Domestic Hot Water (DHW) output: 34.9kW
  • - Efficiency: 98% efficiency / ErP A-rating for heating and hot water
  • - Typical total cost: £2,300 - £2,800

Is a Viessmann Vitodens 100-W combi gas boiler suitable for my home?

The Viessmann Vitodens 100-W is a combi boiler which is suitable for medium-sized properties with up to 15 radiators and 1-2 bathrooms. For smaller homes with a lower demand for hot water, you might want to consider the Vitodens 100-W 30kW combi model. You can use our free boiler comparison tool to check which boiler is most suitable for your home.

What is the output range on this combi boiler?

Since the Vitodens 100-W is a combi boiler, this means it has 2 output ratings as it can provide you with both heating and hot water on demand. This also means that an extra hot water cylinder is not required. This particular model has a maximum central heating (CH) output of 32kW and a domestic hot water (DHW) output of 34.9kW.

What is the size of the Viessmann Vitodens 100-W combi gas boiler?

The dimensions of the Viessmann Vitodens 100-W 35kW combi are 360mm x 400mm x 700mm (DxWxH). It only weighs 35kg which should make the installation process easier. The compact size of this boiler means that it could easily fit anywhere in your home, such as in a boiler cupboard in your kitchen.

Viessmann Vitodens 100-W 35kW combi gas boiler price

The Viessmann Vitodens 100-W combi boiler costs about £1,500, including VAT. Depending on the complexity of your installation and sundries (flue, filter, etc.), the total cost for a Vitodens 100-W could be from about £2,300 - £2,800.

The complexity of the installation will vary depending on factors such as if you are having a like-for-like boiler replacement, or if you are changing from a system or regular boiler, and whether or not you are changing the location of your boiler.

Get the best deals for this combi gas boiler

To ensure you get the best possible deal for the Viessmann Vitodens 100-W 35kW combi, it’s a good idea to compare multiple quotes from Gas Safe registered engineers. As mentioned above, installation costs can vary a lot depending on your current heating system and what plans you have for your new boiler. On top of that, the costs can also vary depending on individual installers’ rates. Therefore, it’s better to check offers from different heating engineers to make sure you’re not overpaying.

If you’re in need of finding a reliable heating engineer who can offer you the best value for your money, then Boiler Guide can help. Simply click the button below to compare up to 3 quotes. It’s completely free of charge and you’re under no obligation to accept any of the offers you receive.
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Warranty on the Viessmann Vitodens 100-W 35kW combi gas boiler

For this boiler, you can get a standard Viessmann warranty of 5 years for both parts and labour. Viessmann offers a variety of warranty options to give you peace of mind, so this model can also be extended up to 12 years if you wish.

Keep in mind though that certain conditions need to be met in order to be guaranteed these warranties, such as having your boiler installed by a Viessmann Trained Installer. In general, it is also important to get your boiler serviced annually with a Gas Safe registered engineer to ensure that your boiler is working efficiently and safely.

Reviews of the Viessmann Vitodens 100-W combi gas boiler

Viessmann is a well-established boiler manufacturer that prioritises delivering the highest quality products and service. All of the components for the Vitodens 100-W combi boiler are manufactured in Allendorf, Germany.

Viessmann is highly regarded by its customers. It receives thousands of excellent reviews on TrustPilot and has an average rating of 4.3 stars out of 5. This is a good indicator that homeowners are generally happy with the standard of products and services they’re receiving, so you can feel confident in choosing a Viessmann boiler.

Furthermore, Viessmann continually features in “Which? Best Buy” awards, meaning that it consistently works on improving the quality of its products to stay ahead of industry standards year after year. So, if you’re looking for a reliable and well-renowned boiler manufacturer, then Viessmann is definitely one to consider.

FAQ

Is Viessmann better than Vaillant?
Vaillant and Viessmann are two of the top boiler manufacturer choices for homeowners in the UK. Viessmann and Vaillant UK both receive excellent ratings on Trustpilot, both having over 4 stars out of 5 based on thousands of reviews. Therefore, you can feel confident in the quality of both companies' products and services.

However, Viessmann's Inox-Radial stainless steel heat exchanger gives it the edge. It's highly resistant to corrosion at a variety of pH levels, meaning it will last longer compared to the typical aluminium heat exchanger from other manufacturers.

Is a Viessmann Vitodens 100 a combi?
Yes, the Viessmann Vitodens 100-W is a gas-fired combi boiler. It has domestic hot water (DHW) outputs available in 27.3kW, 31.7kW and 34.9kW. It is also available as a system boiler.

How long do Viessmann boilers last?
Most boilers, including those from Viessmann, typically last for about 15-20 years. However, this will depend on how well your boiler is maintained. It's important to have your boiler serviced annually by a Gas Safe registered engineer and Viessmann also recommends having it installed by a Viessmann Trained Installer. This way your boiler should last longer and you can potentially be covered by Viessmann's extended 12-year warranty.

What type of boiler is a Viessmann Vitodens 100?
The Viessmann Vitodens 100-W is a gas-fired combi boiler with condensing technology. It's wall-mounted, has a high efficiency rating of 98%, and is available in a variety of power outputs. This means it is suitable for a wide range of homes. It is also available as a system boiler for homes with higher hot water demands.

Get your best deal

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  • Get quotes today, installed tomorrow
  • Finance options available
  • Save up to £500 on installation
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0330 808 0405
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0330 808 0405
4.7/5 out of 26,469 reviews

1,8 million quotes provided in 10 years

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