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 4.8 stars

1,932 reviews

 4.8 stars

1,932 reviews

Viessmann Vitodens 100-W B1GA 25kw Heat Only Gas Boiler

Viessmann Vitodens 100-W B1GA 25kw Heat Only Gas Boiler Boiler
Typical Price (inc VAT)
£1,115
Typical installation Cost (inc VAT)*
£500 - £1000
Sundries (Filter, Flue, etc)
£300
Total Cost
£1,915 - £2,415
Make Viessmann
Model Vitodens 100-W B1GA 25kw Heat Only Gas Boiler
Is Condensing Condensing
Efficiency Rating 92%
Band Rating A Rated
LPG Compatible Yes
Standard Warranty 5 years
Central Heating Max. Output 25kW
Mounting Wall-mounted
Flow Rate N/A
Typical Price (inc VAT) £1,115
Typical installation Cost (inc VAT)* £500 - £1000
Sundries (Filter, Flue, etc) £300
Total Cost £1,915 - £2,415
ERP Rating A Heat

* 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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4.7/5 out of 26,479 reviews

1,8 million quotes provided in 10 years


Viessmann Vitodens 100-W B1GA 25kw heat only gas boiler at a glance

  • - Suitable for: Small to medium-sized homes with up to 15 radiators
  • - Fuel: Gas, LPG, 20% hydrogen mixture
  • - Type: Condensing Regular Boiler
  • - Central Heating (CH) output: 25kW
  • - Efficiency: 92% efficiency / ErP A-rating for heat
  • - Typical total cost: £1,915 - £2,415

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

If you're looking for a gas boiler replacement and have a small to medium-sized home with up to 15 radiators, then a Vitodens 100-W B1GA 25kw heat only boiler may be suitable to install in your home. For this particular boiler, you will need lots of space as regular boilers, also called heat-only boilers, need to be installed alongside a water cylinder and water feed tanks.

What is the output range on this heat only boiler?

The central heating (CH) output size of this Vitodens 100-W heat only boiler is 25kW. 25kW is a great output size if you have a moderate heating demand. If you need a smaller or larger sized boiler, you may want to consider some of the other boilers in this range which have outputs ranging from the 11kW boiler model to the 32kW boiler model.

What is the size of the Viessmann Vitodens 100-W B1GA 25kw heat only gas boiler?

As an open vent, wall-mounted, and gas-fired condensing boiler this boiler is compact. The Viessmann Vitodens 100-W 25kw heat only boiler's size is exactly 285mm in depth, 375mm in width, and 600mm in height. This makes it one of the best small boilers for a cupboard.

Viessmann Vitodens 100-W 25kw heat only gas boiler price

The average cost of the Vitodens 100-W 25kw heat only boiler unit is £1,115. Once you include the total cost of the boiler unit, installation, and sundries (filter, flue, etc), we estimate it will be between £1,915 - £2,415 (inc. VAT). If you would like a more exact price that's tailored to installing this specific boiler in your home, then we highly recommend talking to a Gas Safe registered heating engineer .

Get the best deals for this heat only gas boiler

The first step to find the best deals for the Viessmann Vitodens 100-W 25kw heat only gas boiler is contacting multiple installers. We suggest contacting up to 3 installers near you so that you can compare their quotes side-by-side and then choose the best price. It's a foolproof way to ensure you're not overpaying.

If you're ready to start getting free tailored quotes for this Viessmann boiler from up to 3 different certified installers, then just answer a few questions about your current heating situation to get a quote for a new boiler. Once you fill in the short form, we'll take it from there.

Warranty on the Viessmann Vitodens 100-W 25kw heat only gas boiler

The Vitodens 100-W 25kw heat only gas boiler's warranty is, by standard, 5 years for parts and labour. This particular model also comes with a 10 year warranty for the stainless steel heat exchanger. It's important to note that in order to qualify for any of the Viessmann warranties, you will need to register your boiler online after you have it installed.

Reviews of the Viessmann Vitodens 100-W heat only gas boiler

If you're looking for reviews of the Viessmann Vitodens 100-W heat only gas boiler to confirm if Viessmann is a reliable manufacturer that will satisfy your home's heating needs, then you've found them. From over thousands of reviews on Trustpilot, Viessman scores an excellent score of 4.3 out of 5 stars.

If reviews from customers aren't enough to convince you, then you'll be even happier to know that Which?, a product testing company, continues to award Viessmann products with their Which? Best Buy award.

FAQ

What type of boiler is a Viessmann Vitodens 100?
The Viessmann manufactures the Vitodens 100-W boiler as a combi boiler, system boiler, and regular boiler. Based on your heating demands, you can choose which boiler type best suits your home. If you have a large home and large heating demand, then you may want to consider the Viessman Vitodens 100-W heat only gas boiler.

What is the lifespan of a Viessmann boiler?
The optimal lifespan of a Viessmann boiler is 15 years. If your boiler is older than this, you may want to consider upgrading to a newer boiler. You can ensure your boiler will last longer by ensuring you're using the Viessmann warranty and by getting annual boiler services.

What is a heat only boiler?
A heat only boiler, also known as a regular or conventional boiler, is one of the oldest boiler types. But that doesn't mean it's not used. For instance, the Viessmann Vitodens 100-W heat only gas boiler is a very popular model found in older houses that have a large heating demand.

Is Viessmann better than Vaillant?
When comparing Viessmann and Vaillant based purely on Trustpilot ratings, you'll find that Vaillant is the winner with 4.6 stars. Whereas reviews of Viessmann scored it a 4.3. But whether that means one manufacturer is better than the other depends on what you look for in a boiler.

Get your best deal

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  • Get quotes today, installed tomorrow
  • Finance options available
  • Save up to £500 on installation
Get Quotes Now It only takes 30 seconds
0330 808 0405
Call us to get quotes

We will get you the best deal!

0330 808 0405
4.7/5 out of 26,479 reviews

1,8 million quotes provided in 10 years

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