Boiler Review: Viessmann Vitodens 100-w

Are you looking for a new boiler replacement? Read our Viessmann Vitodens 100-w review to learn about efficiency, saving money and much more!

The Vitodens 100-W is a force to be reckoned with; not just for Viessmann’s own range, but domestic boilers as well.Viessmann Vitodens 100-w Review useful info

You’ll be amazed at the efficiency of new Viessmann condensing boilers. Many like the 100-W and the 050-W operate between 92-97%, saving you a LOT of money. With almost silent operation, Viessmann have produced another award winning boiler in the 100-w. Even so, with multiple options available things can easily get confusing.

For our review, we’ll break down everything that makes the Vitodens 100-w a great modern condensing boiler. We’ve covered everything from efficiency to user controls, so you’re in safe hands!

If you’d like further information, take a look at some of our other articles:

Viessmann Vitodens 100-w Review -Introduction

B T Morgan has installed hundreds of boilers in and around the South/Mid Wales area. Why? Because we’re an experienced and reliable installer,  many of which have been the Viessmann Vitodens 100-w!

You can get this boiler as a combination, system or open vent. Many benefits include:

  • Energy Efficiency Rating: A
  • High quality stainless steel Inox-Radial heat exchanger
  • LPG Compatible/Simple conversion
  • Viessmann 100-w Combi boiler available from 26kw – 35kw
  • Compact Size (70mm x 400mm x 350mm) Combination and System boiler
  • The modulating stainless steel cylinder burner operates at a ratio of 1:6
  • User friendly control via backlit LCD touchscreen
  • Straightforward access from the front, therefore no space is needed at the side for maintenance
  • Optional room thermostats and smart controls are available from many top brands such as Nest, EPH, Hive and Tado
  • Combined PRV and condensate connection, for fast and simple installation
  • Quiet operating noise between 48 – 49 decibels
  • Officially endorsed by Which? – for more information on arranging a Which? Boiler Installation, click here
Viessmann Vitodens 100-w Review, Viessmann HQ

Viessmann have consistently proved themselves a leader in domestic boilers

Viessmann Vitodens 100-w System boiler only – Main Features

The System version’s power output ranges between 19-35kw, also meeting G3 building regulations if combined with a Viessmann 4-pipe system and unvented cylinder. This removes any need for a cut-off valve or overheat thermostat, because they’re integrated into the boiler itself.

Viessmann Vitocell 200/300 varieties available

Viessmann’s cylinder range come in several options such as the 200 and 300

Viessmann Vitodens 100-w Open Vent boiler benefits:

  • Energy Efficiency Rating: A
  • High quality stainless steel Inox-Radial heat exchanger
  • LPG Compatible/Simple conversion
  • Open Vent boiler is available from a 19kw – 35kw
  • Compact Size (H 600mm x W 375mm x D 285mm) (Depth 340mm for the 35kw)
  • Perfect for integration into standard kitchen cupboards.
  • A Matrix Cylinder Burner giving a Modulation ratio of 1:3
  • No pump overrun required (Aids to simple installation)
  • Min static head 1M
  • You can use existing heating controls or operational room stats including smart controls
  • Quiet operating noise ranging between 45 – 48 decibels
  • Optional Weather Compensation
  • Ideal for Y and S plan Systems (Whilst being specifically designed for open vent heating systems, the Vitodens 100-W Open Vent is suitable for sealed systems using an additional expansion vessel and safety valve)
Our Viessmann Vitodens 100-w Review considered quality, speed, results and costs

A boiler’s efficiency should always be considered

Viessmann come from Germany, a country well-known for innovation and design. They’ve become undisputed kings domestic heating in their homeground. but have also shared their advancements across the world as well. Warranties are available from 5 years up to 10 years.

Parts availability

Since entering the domestic boiler arena, Viessmann has continually improved customer service and spare part availability, with all boilers, kits and components supplied to all UK Plumbase branches.

With this in mind, not only is the Viessmann Vitodens 100-W one of the best boilers you can buy on the UK market, but Viessmann themselves have an excellent support system across the country for all parts and components as well. If you need an engineer to look at your boiler, Viessmann can guarantee an engineer to be with you within 24 to 48 hours. They have a 95% first fix rate.

Internal Components

One of Viessmann’s worst kept secrets and biggest selling points is their patented Inox-Radial stainless steel heat exchanger. Besides its high-quality design, one of the best things about this impressive tech is that it’s exclusive to Viessmann themselves.

Viessmann Vitodens 100-w Review, stainless steel heat exchanger

While many other boiler manufacturers might have heat exchangers made with Aluminium, our favourite German manufacturer has their own technology patented, so they’re able to have it produced in-house.

If you’re curious about the benefits of stainless over aluminium, allow us to elaborate on as few key points:

  • Inox stainless steel is an incredibly durable grade of material, just one level down from surgical steel
  • Improved material quality allows the Viessmann Vitodens 100-w to achieve anywhere from 92% to a staggering 97% ErP efficency rating
  • Thanks to the impressive durability of the boiler’s heat exchanger, Viessmann are able to offer a warranty of 10 years on their stainless steel heat exchanger throughout every range
  • Due to manufacturing this component in-house, Viessmanns price point is attractive and affordable
  • Combined Condensate and PRV

One thing to consider (among many) if you’re planning on having a new boiler installed, is the current condition and age of your property. A modern condensing boiler such as the Viessmann Vitodens 100-w can be an excellent choice if you’re looking to modernise, and speaking to an expert such as B T Morgan, can help you find clarity on anything you’re
unsure of.

In particular, Viessmann use a CFS (Combined Flue System) essentially directing boiler flues out a single exit route, whether this is out an external wall, or vertically and up through the roof. On top of this, for all Viessmann boilers, the German manufacturer has combined all PRV and Condensate pipe connections, rerouting them as one pipe.

Weather Compensation

If it’s a Vitodens 100-W Open Vent you’re looking at, ‘intelligent weather compensation’ can help reduce your energy usage.

What is weather compensation?

It’s a technology used in some modern condensing boilers that detects any changes in temperature outside the building. As it does this, your boiler adjusts the flow temperature to take advantage of this change, saving much more money.

Who are Viessmann?

Reading our Viessmann Vitodens 100-w Review, you’ve probably noticed us talk about Viessmann quite highly. While we’ve mentioned small details of Viessmann further up in this article, it’s useful to know more about the manufacturer in order to understand what their strengths are. Having been founded all the way back in 1917, they built up a reputation associated with reliability, innovation, affordability and aftercare support.

Viessmann Vitodens 100-w Review, staff and head office

They also boast some impressive numbers with regards to their internal operations:

  • Currently over 12,000 employees across the world
  • Operating in 12 countries
  • 23 Production divisions in 74 countries
  • 120 Sales offices all around the world

They’ve been operating for over a century, but Viessmann took their first steps into the domestic market way back in 1989. However they’ve still maintained a strong standing in commercial heating since, with notable examples including Cardiff’s very own Millennium Stadium!

They’ve also been the recipient of many prestigious awards over the years such as:

German Design award received reddot design award Viessmann Vitodens 100-w Review, winner of which best buy award

Awards only mean so much to the average customer. Luckily, Viessmann have recognised customer wants and needs to deliver excellent products, just like the Vitodens 100-w. Other products in their range include hot water cylinders, ground source heat pumps and even refrigerators (you’re being heated AND cooled by Viessmann in every ALDI store in the UK!)

Viessmann Vitodens 100-w Review – The Final Verdict

It’s clear we’re quite fond of the Viessmann Vitodens 100-w, but it’s not something we take lightly. As a recipient of several Which? Best Buy awards, it’s dominated many markets such as Germany and other parts of Europe.

Here’s a quick summary of the Viessmann Vitodens 100-w:

  • It’s compact in design and weight, which allows many options for where you can install your boiler
  • Quiet operation – because of the design of the boiler’s internal fan, you’re able to enjoy the comfort of your heated home in silence
  • Up to 97% of fuel used – saving you a lot of money on your energy bills
  • Rated ‘A’ for efficiency
  • Easy-to-use control panel

Now that you’ve learned a thing or two about the Vitodens 100-w, it’s time to choose an installer.

With B T Morgan, we can provide an installation and service to give you the reassurance you desperately need.

Some key features of our service:

  • We’re an independent company with experienced, trained engineers.
  • We operating with reduced overheads, as opposed to large energy companies with endless marketing budgets. B T Morgan remain extremely competitive, with the highest quality installation and best customer service.
  • The attention and care you receive from us from inception to completion is highly personalised, specifically catering your individual needs.
  • 10 Year Extended warranties included across the whole range, at no added cost.

Now that you've read our Viessmann Vitodens 100-w Review we can help you get one installed!

B T Morgan are Approved Viessmann Installers. If you think you’ve found enough reasons to have a Viessmann Vitodens 100-w installed, speak to one of our heating experts by calling on 02920 650 025.

For more information on different boiler types, you can also take a look at some of our other articles:

You can email us at [email protected] for more information, or get a free, no-obligation quote by clicking here!