The Viessmann Vitodens 100-W B1KG 26kW Gas Combi Boiler is a modern wall-mounted condensing combination boiler designed to provide efficient central heating and domestic hot water from a single appliance. With a 26kW domestic hot water output, 10 L/min flow rate at a 35°C temperature rise and ErP A rating, it offers a strong combination of efficiency and hot water performance.
The Vitodens 100-W features a compact 400mm wide × 700mm high × 360mm deep design, making it suitable for space-conscious installations and replacement projects. The boiler weighs approximately 33kg, helping simplify handling during installation.
A user-friendly touchscreen control unit provides straightforward operation, while the boiler’s quiet operation makes it suitable for installation in or near living areas. Its compact dimensions also allow it to be installed inside a kitchen cupboard where the installation requirements permit.
The B1KG range uses a stainless steel Inox-Radial heat exchanger and modern gas condensing technology. It is available for natural gas and LPG applications, with the 26kW version providing a 10 L/min DHW flow rate at a 35°C temperature rise.
Key Features
26kW gas combination boiler
ErP A-rated efficiency
10 L/min DHW flow rate at 35°C temperature rise
Gas condensing technology
Stainless steel Inox-Radial heat exchanger
User-friendly touchscreen control
Compact wall-mounted design
Suitable for space-conscious installations
Suitable for kitchen cupboard installation where permitted
Quiet operation
Natural gas and LPG capability
Designed for replacement and modernisation projects
Compact 400mm width
Specifications
Brand: Viessmann
Model: Vitodens 100-W B1KG
Boiler Type: Gas Condensing Combi Boiler
DHW Output: 26kW
DHW Flow Rate: 10 L/min at ΔT 35°C
ErP Rating: A
Fuel: Natural Gas / LPG
Mounting: Wall
Width: 400mm
Height: 700mm
Depth: 360mm
Weight: 33kg
MPN: 7988414
Flue Gas Connection: 60mm
Ventilation Air Connection: 100mm
Flue: Not included with the standalone boiler
Controls: Touchscreen control unit
What’s Included
Viessmann Vitodens 100-W B1KG 26kW Gas Combi Boiler – 7988414
Integral touchscreen control unit
Boiler components and fittings supplied as standard