Baxi vs. Viessmann Guide: Detailed Comparison & Review
Baxi vs. Viessmann Guide: Detailed Comparison & Review

Baxi vs. Viessmann Guide: Detailed Comparison & Review

Are you looking for an effective, efficient, and powerful boiler for your home? Then your searches may lead you to two different brands: Baxi and Viessmann. In this context, we will examine these two brands, which are the most used combi boiler brands in the UK, in detail. As Zara Heating, we are proud to share our extensive industry knowledge and experience with you. Both brands are leading names on the bestseller list. Moreover, the houses of these brands offer very advantageous usage options for both small houses and larger ones. In this comparison content, we evaluated the brands in terms of product ranges, customer service support, warranty periods, and of course the quality and durability of their products. If you want to get to know these brands closely and do your combi boiler shopping wisely, you are at the right place.

Before we start: Are you looking for an advantageous purchasing opportunity after finding the combi you are looking for? Contact the Zara Heating team! We offer you the most advantageous prices in the industry by partnering with brands, and we also provide various additional warranty and maintenance options at these prices. If you want to complete your purchase in the most advantageous way and have the combi boiler installed in the safest way, call us now. Zara Heating is one of the leading combi boiler maintenance, repair, and installation companies based in the UK.

Closer Look to Baxi: Who Are They?

Baxi, one of the most preferred combi boiler brands in the UK, is a company that has been actively growing and developing since the 1800s. The majority of the products made by the brand draw attention with their low carbon emissions. The brand, which produces boilers and heating products for homes, has both simple boiler options and system boiler alternatives.

The first step in the brand's existence was a simple production facility established in Lancashire. Today, the production facilities of the world giant company are located in regions such as Preston, Norwich, and Milton Keynes. It is possible to say that the brand, which has a large market share, employs more than 1400 personnel. It is possible to say that BDR Thermea Group, known as Baxi's parent company, was established in 2009 by the merger of two different companies: Baxi and De Dietrich Remeha.

Continuing its existence as a part of BDR Thermea, Baxi is particularly known in the UK for its durable products in the categories of gas boilers, LPG boilers, and heat-only boilers.

What Are The Most Popular Boiler Models of Baxi Brand?

Here are the most popular boilers of the Baxi brand:

  1. Baxi 200: Combi boiler products, which do great work without the need for a hot water cylinder, can be shown as the prominent category of Baxi. In this regard, the popular product on the bestseller list of the brand is Baxi 200. This product is very advantageous with its efficiency level of up to 89 percent and its default 5-year warranty. If you purchase the product through Zara Heating, you can take advantage of additional warranty processes.
  2. Baxi 800: Baxi 800 is one of the popular combi boiler products of the brand. The most important feature of the product is that it is compact enough to fit even in a kitchen cabinet. The combi boiler, with a width of only 290 mm, is especially preferred by those living in apartments. The popular product of the brand has three different performance alternatives of 25, 30, and 35 kW.
  3. Baxi Duo-Tech Combi: The Baxi Duo-Tech Combi is considered ideal for a house with 10 to 15 radiators. Large houses can easily provide both hot water and heat balance thanks to the options offered as 33 to 40 kW. The hot water flow rate of the product, on the other hand, marks one of the industry's leading performances: a full 16.4 liters per minute. You can contact our experts to discover more.


Our Comments of Baxi Boilers – Are They Worth to be Bought?

Flue options - This brand, which draws attention with its various flue options and produces its products in the UK, can offer a perfect solution especially for those who complain about low flow rates. While the Baxi 624 combi, one of the popular models, provides a flow rate of 10.2 liters per minute, the Baxi Duo-Tech 40 combi can reach a record level of 16.4 liters per minute.

Stainless steel quality - The most important feature of the Baxi brand is the use of stainless steel heat exchangers in some boiler models. These heat exchangers, in which energy is converted into heat and water is heated, can be much longer-lasting and durable when stainless steel is used. While other brands use aluminum in this component, corrosion is prevented by steel.

Warranty packages - Baxi's warranty packages offer both labor and parts warranties. In general, Viessmann warranties are fairly simple and clear, while Baxi's warranty terms and conditions can vary considerably from model to model. For example, some of the confusing examples are as follows:

  1. the Baxi 200 Combi has a 3-year parts and labor warranty
  2. the Baxi 400 Combi has a 5-year parts and labor warranty
  3. the Baxi 600 Combi has a 7-year parts and labor warranty
  4. the Baxi 800 Combi has a 10-year parts and labor warranty

If you are wondering about other models, you can contact Zara Heating experts and get detailed information.

Green-friendly - Baxi also stands out for producing environmentally friendly products. In fact, its three different products are Energy Saving Trust certified: Duo-tec 24 Combi ERP, 124 Combi ERP, and Megaflo 15 System ERP. Discover the brand more closely!


Closer Look to Viessmann: Who Are They?

Standing out with Residential gas boilers, UK's popular brand Viessmann maximizes durability with the medical stainless steel materials they use in their interior parts. The brand, which was established in 1917 and has been developing technology in the field of heating systems for over a hundred years, has been serving in the UK since 1989. The firm's headquarters is located in Telford, Shropshire. It is possible to say that the brand, whose products you can find on the bestseller list in England every year, is one of the active members of the market. The prominent product groups of the company are as follows:

  1. gas boilers
  2. oil boilers
  3. air and ground source heat pumps
  4. steam boilers
  5. biomass boilers
  6. combined heat and power generation

Today, Viessmann offers different warranty periods in its standard package and in the package with installation carried out with a trained installer. For all boiler products except Vitodens 050- W, the warranty period is five years after installation with a trained installer. However, as a result of special agreements with the trained installer, the period can be increased to 7, 10, or 12 years. Did you know that all Zara Heating experts are trained installers and will provide you with additional warranty time after the installation to be performed?

Other models offer a five-year warranty after installation with a trained installer, compared to 7 years for the Viessmann 050 - W model. Go to the relevant page to browse the product immediately.

What Are The Most Popular Boiler Models of Viessmann Brand?

The most popular boiler products of the Viessmann brand are as follows:

  1. Viessmann Vitodens 200-W is one of the models that are sold and installed safely by Zara Heating experts. This product is one of the devices that can be easily controlled via the LCD touch screen and works very quietly. Silent operation makes the device a product that can be preferred even in small houses and apartments. This product of the brand, which has 26 and 35 kW size options, is frequently preferred due to its affordable prices. A bonus: The product can also be easily used with smart thermostats.
  2. The Viessmann Vitodens 111-W Combi Boiler is another popular boiler model. The product is especially preferred by families who demand hot water from more than one tap at the same time. Because it has a very high processing capacity with its 26 and 35 kW size options. Another feature of the product is the hot water tank. This feature gives you access to instant hot water in a blink of an eye when you turn on the faucet. Because a certain amount of water is already kept warm in the tank.
  3. Viessmann Vitodens 100-W Regular Boiler is preferred by those who want to buy a system boiler from Viessmann. The product, which attracts attention with its low carbon emission, environmentally friendly system, and small size, operates very quietly despite its efficiency. The LCD screen, which allows you to easily control the device, is one of its most user-friendly features.

Our Comments of Viessmann Boilers – Are They Worth to be Bought?

When we take a look at the boiler products of the Viessmann brand, we clearly see that:

  1. They have very competitive prices, which can be an advantage for consumers.
  2. It is very important for the brand to stand behind the products it produces. For this reason, it can sometimes be a good option to prefer a company that produces the parts of the boilers, rather than imports them. Viessmann is a company that produces all internal components for all of the boilers it produces.
  3. No matter which Viessmann product you buy, you will benefit from the stainless steel heat exchanger. This means that the brand promises durability and longevity in its products. This is different in Baxi, remember: Aluminum material can be used in Baxi boilers.
  4. Viessmann is an innovative option as a brand and reassuring with its R&D studies and investments. This brand, which has had a pioneering appearance for many years, also gives confidence.
  5. In the UK, Viessmann is used very heavily indeed. This means that in case of any malfunction, you can easily find spare parts for the device.
  6. If you live in a small house and your boiler is close to the living areas of the house, choosing a silent boiler may be more important than you think. For this, Viessmann's models look really good. Especially the Vitodens 200-W and Vitodens 222-F models are really useful options for quiet operation despite their high efficiency.
  7. The last thing we must say about Viessmann boiler products is that all boiler models have air compensation technology. We have mentioned this technology before in this content, you can take a look. For now, let's just say this: This feature really works for increasing efficiency.

Direct Comparison of Baxi and Viessmann

Before we wrap up our content, we wanted to add a table that directly compares the Viessmann and Baxi brands here. We want you to have a look right now, it will be very helpful!



The brand has been operating in the UK since 1866.


The brand has been operating in the UK since 1989.


Customer service engineers and the services they offer are approved by Which? Trusted Traders. They offer high-quality repair and maintenance.


Domestic boilers of Viessmann Vitodens have been popular products since 2017 in the Which? Best Buy list.


One of Baxi's most popular products, Baxi 636 is the primary replacement for Viessmann Vitodens 050- W. When we look at the features of this product, we see 89 percent efficiency, 15 liters of water per minute, and a 7-year part and labor guarantee.


Viessmann Vitodens 050- W, one of Viessmann's most popular products, is shown as the primary replacement for Baxi 636. When we look at the features of this product, we see 93 percent efficiency, 14.5 liters of water per minute, and a 10-year part and labor guarantee. This ten-year warranty is valid if the installation is performed by the Viessmann-trained installer.


You can call Zara Heating to purchase at the most advantageous prices and contact us for maintenance, installation, and repair.

You can call Zara Heating to purchase at the most advantageous prices and contact us for maintenance, installation, and repair.