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Published February 8, 2024

Viessmann Vitodens 100-W Guide

When it comes to choosing the right boiler for your home, energy efficiency and reliability are paramount. The Viessmann Vitodens 100-W boiler is a gas-condensing boiler designed to provide just that, along with a host of other features to make your life easier.

In this review, we will take an in-depth look at the Vitodens 100-W, discussing its pros, cons, and price to help you make an informed decision for your home heating needs.

Viessmann Vitodens 100 W – Overview

  • Viessmann Vitodens 100-W boiler offers reliable and efficient heating performance with advanced features such as Lambda Pro technology, touchscreen control panel, WiFi connectivity & ViCare app compatibility.
  • The system has an energy efficiency rating of 94% and a performance rating of 9 out of 10.
  • It is an economical choice for modern households, starting at approximately £2,100 for full installation.

Is the Viessmann Vitodens 100-W Any Good?

You are probably going into this guide thinking, “Is the Viessmann Vitodens 100 w any good?”. Well, we are here to let you know all about this boiler model and what it can do for you.

The Vitodens 100-W boiler features:

  • A high standard of performance contributing to significant energy savings
  • Lasting efficiency due to advanced technology
  • Overall rating of 9.25 out of 10, placing it in a high energy efficiency class
  • Which? Best Buy Award from 2017 to 2020, a testament to its convenient and effective control.

Viessmann consistently ranks high in customer satisfaction, with an average rating of 4.5 stars out of 5 on Trustpilot for Viessmann UK. This reflects the satisfaction of customers who have installed the heating system directly.

Furthermore, Viessmann is ranked among the best combi boilers available in the UK and Europe, showcasing its innovative technology.

With an extremely affordable price, this boiler model includes the Lambda Pro combustion control system. This impressive rating, combined with its exceptional performance and reliability, makes the Vitodens 100-W an attractive choice for homeowners looking to invest in a reliable and efficient heating system.

Viessmann Vitodens 100 W Price

Saving money is important to just about everyone, so you will probably want to know what the usual cost of a Vitodens 100-W boiler is so you aren’t wasting your money.

The Vitodens 100-W boiler is priced at approximately £2,100, inclusive of full boiler installation and a high vicare nominal heat output. Keep in mind the price of the boiler and Gas-safe installation can fluctuate based on property type, hot water needs, and factors like smart technology integration.

Without installation, the usual price range for a Vitodens 100-W combi boiler is between £940 and £1,220, depending on the power output you require.

Despite these variations, the Vitodens 100-W offers a premium product at an economical cost, including an outdoor temperature sensor.

You can get an immediate fixed price and same-day installation for a Vitodens 100-W boiler by responding to some online inquiries. This option also includes an integrated wifi interface for added convenience.

Features of Vitodens 100-W

The Vitodens 100-W boiler is known for its compact size, user-friendly touchscreen, and high energy efficiency. One of its unique features is the Lambda Pro technology, which ensures the gas valve is constantly regulated to the air and gas mix it receives, guaranteeing maximum efficiency and burn rate.

The MatriX-Plus burner is a notable feature of its Lambda Pro combustion controller. This ensures high efficiency and clean combustion consistently. This burner is also certified for up to 20% hydrogen content in natural gas.

The Vitodens 100-W boiler offers the following features:

  • Compatibility with both regular and smart thermostats
  • Built-in WiFi for convenient remote control through a phone, tablet, or computer
  • Remote diagnosis of any issues by engineers

This makes it an excellent choice for homeowners looking to integrate their heating system with smart home technology featuring innovative technology.

The Vitodens 100-W boiler also includes the ViCare app, offering digital services and easy contact with your local heating contractor.

Sizes & Dimensions

The Vitodens 100-W boiler is designed to be compact, making it suitable for installation in small spaces such as kitchen cupboards.

A Vitodens 100 W boiler’s dimensions are as follows:

  • Height – 700mm
  • Depth – 350mm
  • Width – 400mm

This compact design ensures minimal intrusion on living space while still providing the power and efficient combustion needed to heat your home effectively and maintain permanently high efficiency.


The Vitodens 100-W boiler features:

  • User-friendly design with a straightforward touchscreen display
  • Backlit LCD touchscreen for easy control and access from the front
  • On-screen buttons for making settings and accessing information
  • Convenient and user-friendly interface for controlling the heating system

The touchscreen control panel benefits include easy operation, a clear, backlit LCD display, and the ability to manage the boiler via the touchscreen or the ViCare app. This intuitive operation ensures that homeowners can easily control and monitor their heating system directly.

Energy Efficiency

The energy efficiency rating of the Vitodens 100-W boiler is 94%, making it an environmentally friendly and cost-effective choice. This high-efficiency level allows for considerable cost savings and makes the Vitodens 100-W a financially viable option for heating and hot water supply.

The impressive energy efficiency of the Vitodens 100-W is due to its design that minimises energy waste, helping to reduce heating bills.

Combined with its compatibility with smart thermostats and remote control capabilities, the Vitodens 100-W boiler stands out as an energy-efficient and convenient choice for modern homeowners.

Viessmann Vitodens 100 W Pros

Now, I’m sure you want to hear all about the benefits of installing a new Viessmann Vitodens in your home.

Here are several advantages to choosing the Viessmann Vitodens 100-W gas condensing boiler for your home heating needs:

  • High efficiency
  • User-friendly controls
  • Compatibility with smart thermostats
  • Lambda Pro combustion control system ensures maximum efficiency and significant energy savings.

The Vitodens 100-W boiler’s performance ratings are impressive, with a 9 out of 10 rating for both performance and reliability. This high rating contributes to reduced energy costs, making the Vitodens 100-W a smart investment for homeowners looking to reduce their heating bills.

Moreover, the Vitodens 100-W boiler provides various features that simplify usage and maintenance. The touchscreen control panel is highly user-friendly and provides a clear, backlit LCD display for easy operation.

The boiler is also compatible with the ViCare app, allowing homeowners to easily control and monitor their heating system remotely.

Viessmann Vitodens 100 W Cons

Even though the Vitodens 100-W boiler is a great choice for many homeowners, it’s wise to think about potential limitations or drawbacks. Some users have reported issues with the boiler, such as Wi-Fi connectivity problems and touchscreen reliability.

However, these issues seem to be relatively isolated and do not detract from the overall performance and efficiency of the boiler.

One should also be aware that the Vitodens 100-W boiler can encounter various issues, including:

  • No hot water
  • Burner lockout
  • Frozen condensate pipe
  • Low boiler pressure
  • Boiler leaks

However, these issues are not exclusive to the Viessmann Vitodens 100 w and can happen to every boiler.

Despite these potential issues, the system boiler includes an inclusive warranty, guaranteeing that any problems can be swiftly fixed by a certified technician.

Vitodens 100-W Warranty

One of the most decisive aspects of choosing a new boiler is the boiler warranty available on it, as you want to make sure you are covered in case of any manufacturer faults or damage.

The Viessmann Vitodens 100-W boiler comes with a warranty of 10 years and even up to 12 years when purchased from specialised installers, ensuring peace of mind for homeowners. This extended warranty covers potential issues and provides added assurance in the quality and longevity of the boiler.

Viessmann also offers a five-year guarantee for the entire system once connectivity is established, providing additional protection for homeowners.

This warranty coverage, combined with the boiler’s impressive performance and energy efficiency ratings, makes the Vitodens 100-W a wise investment for those seeking a reliable and efficient heating solution.

Vitodens 100-W – Final Thoughts

Going through this guide, you will now know a lot more about Viessmann boilers than you did before, as well as understand that the Viessmann Vitodens 100-W boiler is an excellent choice for homeowners seeking an energy-efficient, reliable, and user-friendly heating solution.

Its high-performance ratings, innovative technology, and compatibility with smart thermostats make it a top contender in the market.

While there are some reported issues, the extensive warranty provided by Viessmann ensures that homeowners can enjoy peace of mind and confidence in their investments.

If you’re considering a new boiler for your home, the Vitodens 100-W is a strong contender that offers a range of benefits and features to meet your heating needs.

Its combination of high efficiency, user-friendly controls, and smart technology integration make it an attractive option for modern homeowners looking to reduce their energy bills and enjoy a comfortable living environment.


Why are Viessmann boilers so expensive?

Viessmann boilers are expensive because they use high-quality components such as stainless steel heat exchangers that are manufactured in-house.

This ensures a longer lifespan compared to cheaper options sourced from third parties, which ultimately makes the extra cost worth it.

Is Viessmann better than Worcester?

Based on technical superiority and overall quality, Viessmann and Worcester are often ranked as the best boiler brands available.

Which one you prefer is up to you, as both have their own pros and cons.

Which is better Vaillant or Viessmann?

Viessmann offers high efficiency, extended warranty and technologically superior stainless steel heat exchangers, which is why they are so popular among homeowners.

Vaillant is also among the best boiler manufacturers in Europe, but the Vitodens 100-W is a more efficient and effective choice for your property.

What type of boiler is a Viessmann Vitodens 100?

The Viessmann Vitodens 100 is a high-efficiency, A-rated gas condensing boiler, ideally suited for existing open-vented or sealed systems.

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