Gas condensation boiler Viessmann Vitodens 111-W B1LG with built-in 46l water tank, 25kW

Viessmann Vitodens 111-W B1LG – Gas Condensing Combi Boiler with Integrated 46 L Tank (25 kW)

The Viessmann Vitodens 111-W B1LG (25 kW) is a powerful wall-mounted gas condensing combi boiler featuring an integrated 46-liter stainless steel loading cylinder, designed to deliver heating and high hot water comfort in one compact system. Perfect for larger homes or households with high DHW demand, it offers quiet operation, smart control, and exceptional performance.

With a MatriX-Plus burner, Inox-Radial stainless steel heat exchanger, and Lambda Pro Plus combustion control, it achieves up to 94% seasonal efficiency and is ready for up to 20% hydrogen in the gas mix.

Key Features and Benefits

✔ Output Range: 3.2 – 25.0 kW (modulating 1:8)
✔ Integrated DHW Tank: 46 L stainless steel cylinder
✔ DHW Peak Flow Rate: Up to 18 L/min at ΔT 30 °C
✔ Energy Efficiency Class: A / A+ at 35 °C flow temperature
✔ Seasonal Efficiency (Hs): up to 94%
✔ Burner: MatriX-Plus + Lambda Pro Plus combustion control
✔ Heat Exchanger: Inox-Radial – corrosion-resistant and durable
✔ Hydrogen Ready: Up to 20% H₂ blend compatible
✔ Smart Connectivity: Built-in Wi-Fi for ViCare app
✔ Dimensions: 600 × 480 × 900 mm
✔ Weight: 66 kg
✔ Low Noise Operation: Quiet enough for installation in living spaces

Vitodens 111-W B1LG (25 kW) combines top heating and hot water performance with A+ efficiency, future-ready design, and smart controls — all in one compact appliance.