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A white Viessmann Vitodens 100-W B1GA 25kW heat gas boiler on a green gradient background, with yellow text bubbles stating "Fully Fitted" and "£0 Deposit" above the product name and description.

Viessmann Vitodens 100-W B1GA 25kW Heat Gas Boiler

£3,250.00

Versatile heat only boiler for medium to large homes, with high efficiency and smart connectivity.

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10 in stock

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The Viessmann Vitodens 100-W B1GA 25kW Heat Gas Boiler is a condensing heat only boiler for medium to large homes with up to 15 radiators, requiring a hot water cylinder and feed/expansion tank. It provides a 25kW central heating output and a 94% seasonal efficiency rating (ErP A-rated). Measuring 700x400x350mm and weighing 33kg, it fits in a cupboard with no side clearance. It features the Inox-Radial stainless steel heat exchanger, a MatriX-Plus burner with Lambda Pro Control (natural gas, LPG, or 20% hydrogen blends), and an LCD touchscreen for intuitive control. Quiet Mark approved, it supports flexible flueing, weather compensation, and OpenTherm compatibility. It offers a 10-year warranty, extendable to 12 years with a Viessmann-accredited installer, suitable for homes with higher heating demands.

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Specification
Power Output (Heating)25 kW
Power Output (Hot Water)Dependent on Cylinder
Boiler Depth285 mm
Boiler Height600 mm
Boiler Width375 mm
Weight23 kg
BrandViessmann
ColourWhite
Boiler TypeHeat Only
Fuel TypeNatural Gas or LPG
Heat Exchanger MaterialStainless Steel (Inox-Radial)
Energy Efficiency RatingA (ErP)
Display TypeLED Touchscreen
Fitting RequirementsMust be Fitted by Gas Safe Registered Engineer
Mounting System SuppliedWall-Mounting Bracket Supplied
Indoor/Outdoor UsageIndoor
Connector TypeStandard Hydraulic Connections
Manufacturer Guarantee5 Year Warranty (Extendable to 12 Years with Viessmann Trained Installer)
Model Name/NoVitodens 100-W B1GA 25kW
Pack Size1
Parent ColourWhite
Pieces in Pack/Case1 Boiler
Product TypeGas Heat Only Boiler
Range NameVitodens 100-W
Flue LengthUp to 12 m (60/100 mm)
Modulation Range1:10
Noise Level45 dB(A) (Estimated)
Annual Energy Consumption92% Efficiency (Estimated)
Temperature CoefficientNot Applicable
CertificationsErP A-Rated, Gas Safe Compliant, 20% Hydrogen Blend Ready

Availability: In Stock

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