


Viessmann offers a full range of high-quality products that represent German engineering at its finest. Extremely reliable boilers that offer great performance are one of the reasons why Viessmann regularly picks up the Which? Best Buy award.
Viessmann has a wide range of high energy-efficiency combi, system, and regular boilers available.
Viessmann Boilers
If you’re a big fan of precision German engineering, then there will certainly be a Viessmann boiler suited to your home. Viessmann boilers are renowned for performance and reliability, Which? Brand reviews have them just behind Worcester Bosch and Vaillant but they are classed as a premium brand boiler.
Viessmann manufactures a range of combi, system, and regular boilers. If you aren’t sure what boiler type you have, check out our blog, it’s important to know your boiler type before getting any boiler quotes.
Once you know what boiler type you’re looking for, you can use the WarmZilla boiler comparison function below. Just select up to 3 boilers you want to compare and you’ll be able to compare key stats side by side to see which Viessmann (or any other boiler brand) boiler is best for you.
You can also take the WarmZilla survey, by answering a few simple questions about your home we will be able to recommend suitable boilers for your heating and hot water requirements. You can get a quote on a new boiler in just a few minutes without adding any personal details.
WarmZilla stocks the Viessmann 050w and the Viessmann 100w boiler ranges because Viessmann offers excellent reliability on boilers with very high levels of energy efficiency.
WarmZilla currently offers combi gas condensing boilers from Viessmann in a range of kW options to suit small flats, apartments, and any size home.
Viessmann boilers sold by WarmZilla come with Gas Safe installation, system filter, system cleanse, inhibitor, wireless thermostat, up to 12 years guarantee, any flues or extension kits you may need; plus, if your condensate or gas pipes require upgrading – that’s included in your fixed price Viessmann boiler quote too!
You can also upgrade your wireless thermostat to a choice of smart thermostats and you can add radiators to your order – all your heating requirements with one easy online purchase.
Viessmann boiler prices vary depending on the model you choose and the kW output of the model you require. You can get a boiler quote now and find out exactly how much your new Viessmann boiler will cost, in a few minutes using the WarmZilla online survey.
Having heating and hot water in your home is crucial, which is why it is essential to ensure that you get your boiler annually serviced so that it can perform to its maximum efficiency.
Have your boiler serviced annually ensures greater reliability of your boiler, increases its lifespan, enhances safety for you and your home, and ensures that your boiler warranty is protected.
A typical boiler service consists of:
- A full inspection of your boiler’s components by a Gas Safe Engineer
- An inspection of the main injector, spark probe, and burner to the heat exchanger, electrical connections, and controls.
- Your Gas Safe Engineer should also check all the seals, pipework, and combustion releases to make sure that your boiler is functioning at the correct pressure
- Replacement of any damaged or worn parts
- Clean the necessary components to ensure your boiler is performing as effectively as possible.
When should you arrange a boiler service?
Your boiler manufacturer will often mention that your boiler requires an annual service to ensure maximum efficiency and to protect your warranty. If you don’t get an annual service, you could end up paying for repairs, which can be quite costly depending on the boiler fault.
Other signs that you should look out for that indicate that you need a boiler service are:
- If you see increased condensation in the room where your boiler is located
- Black stains or marks around your boiler
- The flame in your boiler changing from blue to yellow.
If you start to feel nausea, tiredness, dizziness, start vomiting or having headaches, stomach pains or have difficulty breathing, please call your Gas Engineer immediately and vacate the property, as this could be a sign of Carbon Monoxide poisoning.
The Vitodens 100-W 19kW is a reliable combi gas boiler, with an output of 27.3kW for central heating and 19kW for hot water, which is ideal for medium-sized homes with up to 15 radiators and a single bathroom and en-suite. For larger homes with a higher demand for hot water and central heating, the Vitodens 100-W 25kW and 32kW.
Thanks to its high-efficiency rating of 94% and also an ErP A-rating for both heat and hot water, the 100-W combi boilers are known for their reliability and their ability to reduce your carbon footprint and energy bills. Also, thanks to its compact design, this model can be installed neatly into your standard kitchen cupboard.
Combi boilers are often preferred over a system or regular boiler as they remove the need for any additional storage tanks or cylinders, as both your central heating and a water heater is combined in one unit, saving you space in your home.
With an efficiency rating of 94% and an ErP a-rating for heat, the Vitodens 100-W 25kW combi gas boiler is a highly reliable combi boiler that could help you reduce your energy bills and carbon footprint, depending on your current boilers efficiency rating.
Combi boilers are often chosen over a system or regular boiler as it is compact in size, meaning it can be installed neatly into a standard kitchen cupboard. Another benefit of a combi boiler is that they remove the need for any additional storage tanks or cylinders, this is because it combines both a water heater and a central heating unit in one, saving space in your home.
The Vitodens 100-W 25kW has an output of 25kW for central heating and 31.7kW for hot water. This output is powerful enough to heat small homes with up to 15-20 radiators and a single bathroom. If your property has a higher demand for heating and hot water, the 100-W 32kW model is available. But for smaller homes, we recommend the Viessmann Vitodens 100-W 19kW.
The Vitodens 100-W 30kW Combi gas condensing boiler offers convenience with its simple-to-use controls. With an excellent price for a high-quality unit, the 100-W provides some great features. Durable and efficient thanks to the stainless steel Inox-Radial heat exchanger, the 100-W has high efficiency of 98%, offering an ErP A rating.
Built-in Wi-Fi also provides smart capabilities for the heating to be controlled in the palm of your hand via a smartphone or smart device. However, the touch screen LCD screen offers easy-to-use functionality, adding an extra modernised touch.
The Vitodens 100-W 32kW is a reliable combi gas boiler, with an output of 32kW for central heating and 34.9kW for hot water, ideal for medium to larger-sized homes with up to 20 radiators and 2 bathrooms.
This model is the most powerful of its range, which may not be necessary for homes with a lesser demand for heating and hot water. In this instance, the 19kW and 25kW combi boilers are available. On the other hand, if your home demands more heating and hot water, then Viessmann Vitodens 050-W 35kW might be the right choice for you.
Combi boilers are often preferred over a system or regular boiler as they remove the need for any additional storage tanks or cylinders, as both your central heating and a water heater are combined in one unit, saving space in your home.
Thanks to its high-efficiency rating of 94% and also an ErP A-rating for both heat and hot water, the Vitodens 100-W 32kW combi boiler is reliable and has the ability to reduce your carbon footprint and energy bills. Also, thanks to its compact design, this model can be installed neatly into your standard kitchen cupboard.
The Vitodens 100-W 35kW Combi gas condensing boiler offers convenience with its simple-to-use controls. With an excellent price for a high-quality unit, the 100-W provides some great features. Durable and efficient thanks to the stainless steel Inox-Radial heat exchanger, the 100-W has high efficiency of 98%, offering an ErP A rating.
Built-in Wi-Fi also provides smart capabilities for the heating to be controlled in the palm of your hand via a smartphone or smart device. However, the touch screen LCD screen offers easy-to-use functionality, adding an extra modernised touch.