The Viessmann Vitodens 100-W System is a gas condensing boiler that can stand up to the highest of heating and hot water demands.

This system model measures 700mm (H) x 400mm (W) x 350mm (D) and comes in four different outputs of 19kW, 26kW, 30kW and 35kW to suit properties of all sizes. You won’t need a cold water tank in the loft with this boiler but you will need a separate cylinder for storing your hot water.

As there is a choice of output options available, Vitodens 100-W System prices vary from £901.41 to £1,181.23. The boiler comes with a standard 5-year warranty, which can be upgraded to 10 years if you choose a Viessmann trained installer to carry out the installation.

Boiler Energy Efficiency Credentials

Designed to help you save on energy costs, the Vitodens 100-W System is an A rated boiler with a SEDBUK seasonal efficiency rating of 89.5%. It features a high efficiency A rated stainless steel Inox-Radical heat exchanger that boasts an efficiency rate of 98%. This appliance has a modulation ratio of 1:6 to allow the boiler to modulate down in line with your home’s demand, which improves efficiency and maximises operational savings. You can also purchase optional intelligent accessories to save more energy and money, including room thermostats, 7-day timers and the popular tado° thermostat and app.

Vitodens 100-W System Technology and Main Advantages

Made in Germany, this model comes with a whole host of features for easy installation such as a pre-plumbing jig, safety fittings and flue lengths up to 19 metres. It’s supplied fully wired and assembled, so that should help to make installation quicker as well. In addition to this, the boiler components can be accessed from the front of the unit for hassle-free servicing and maintenance.

The stainless steel Inox-Radical heat exchanger not only boosts efficiency, reliability and performance but also ensures the boiler has a very long life. Viessmann is so confident about the quality of this component, the brand guarantees it against leaks resulting from corrosion for a full 10 years.

You’ll be pleased to know that the boiler is user-friendly and programmed with a clear backlit LCD touchscreen display to enable you to control settings and temperatures even when the appliance is sited in a poorly lit area. It’s also set up to be used with an optional external weather detector, which allows the boiler to react to outside conditions and adjust temperatures accordingly. Furthermore, the Vitodens 100-W System is an extremely quiet unit that can be kept in or near a busy room.

Is the Viessmann Vitodens 100-W System the Right Boiler Type and Size for Your Home?

With four outputs on offer, the Vitodens 100-W System is suitable for homes of all sizes, as well as properties with a hot water cylinder and more than 1 bathroom because it can provide a constant supply of hot water to all of your taps at the same time. It’s also a good solution for homes with little or no loft space as there is no need for a bulky cold water tank. As a general rule, smaller dwellings with smaller needs will require the lower output options and larger homes with higher demands will need to choose one of the higher output units. Like we always say, you will need to ask a Gas Safe engineer to take a look at your property and assess your typical usage habits to ensure you pick the right kilowatt size boiler.