Viessmann Vitodens 100-W

The Viessmann Vitodens 100-W is one of the most popular gas condensing boilers on the market, having earned multiple Which? Best Buy awards between 2017 and 2021. Engineers and homeowners consistently give it strong feedback on its reliability, ease of servicing, availability of spare parts, and build quality.

A Quick Look at Viessmann

Founded in 1917 in Germany, Viessmann started as a locksmith business before moving into heating technology. Johann Viessmann responded to demand from local gardeners to create efficient boilers, leading to innovations in steel boiler design that offered faster heating and reduced fuel use. Today, the Viessmann Group remains a global leader in heating solutions.

Why Choose the Vitodens 100-W?

The Vitodens 100-W is a compact, lightweight, and highly efficient gas condensing boiler ideal for smaller, well-insulated homes. Known for its quiet operation and smart functionality, it features integrated Wi-Fi for remote monitoring and adjustments, reducing the need for third-party controls.

Its updated internal design has cut the number of spare parts needed for Viessmann Vitodens by up to 50%, making servicing easier and more cost-effective. The boiler is also hydrogen-ready (20% H2 blend), future-proofing your heating system for the years ahead.

Available models:

• System boilers: 11kW, 19kW, 25kW, 32kW
• Combi boilers: 26kW, 30kW, 32kW

Key Information

The Latest Viessmann Vitodens 100-W Features

Viessmann Vitodens 100-W Key Features

• Inox-Radial stainless steel heat exchanger – Highly durable and efficient, this is one of Viessmann’s standout components.
• MatriX-Plus burner – Designed for low NOx and CO₂ emissions, ensuring a longer service life and reduced environmental impact.
• Lambda Pro Plus combustion control – Automatically adjusts to gas quality for consistent, efficient performance.
• Integrated Wi-Fi and ViCare compatibility – Enables remote monitoring, control, and diagnostics via smartphone or tablet.
• Quiet operation and compact size – Small enough to fit in a standard kitchen cupboard, ideal for space-conscious homes.
• Hydrogen-ready (20% blend) – Future-proofed to run on a hydrogen blend as the UK transitions to greener energy.
• Modulation ratio up to 1:10 – Ensures the boiler operates efficiently even at low demand, saving energy and costs.
• Touchscreen control and app-based management – Adjust heating and hot water easily via the boiler’s display or the ViCare app.
• Weather compensation capability – Available with an external sensor for further energy savings based on outdoor temperature.
• Up to 10-year warranty on the heat exchanger – Extended warranties available through Viessmann-accredited installers.
• LPG conversion kit – Available for off-grid properties.
• Compatible with Viessmann’s ViStart, ViCare, and Vitoguide software – Supports easy installation, commissioning, and remote service diagnostics.

Smart Control with ViCare

The most recent major update to the Vitodens 100-W in April 2021 introduced integrated Wi-Fi, making it fully compatible with Viessmann’s battery-powered, RF-connected ViCare Thermostat.

The ViCare app offers:

• Real-time boiler status and notifications
• Remote adjustments to heating and hot water settings
• Programmable heating schedules by zone
• Remote diagnostics and support from your Gas Safe engineer

Is the Vitodens 100-W Right for Your Home?

While the Viessmann Vitodens 100-W is a fantastic all-rounder for many homes, the best boiler for your property depends on several factors, including the size of your home, hot water demand, number of bathrooms, and existing system setup.

We offer a quick and easy online boiler survey to make things easy. Just answer a few simple questions, and we’ll recommend the best boiler options tailored to your needs and budget, no jargon, no pressure.

Take the Boiler Survey Now to find the perfect fit for your home.

Why the Vitodens 100-W Is a Solid Boiler Choice

The Viessmann Vitodens 100-W is a reliable, high-efficiency condensing boiler with excellent performance, sleek design, and innovative functionality, making it a strong choice for modern homes. Whether replacing an outdated system or upgrading to improve energy efficiency, the 100-W delivers great value with features like a touchscreen display, integrated Wi-Fi, and compatibility with the ViCare app for remote control and diagnostics.

If your home requires more hot water, consider exploring the Vitodens 111-W. It includes an integrated 46 L stainless steel storage tank and can deliver up to 181 litres of hot water in 10 minutes, ideal for busy households.

Take our quick boiler survey to determine whether the Vitodens 100-W or another model best suits your home.