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Viessmann

Vitodens 100-W 30kW combi

Gas combi boiler, 31.7 kW hot water output

Last reviewed 13 September 2026

Specifications

Hot water output31.7 kW
Central heating output25 kW
ErP classA
Seasonal efficiency98%
Dimensions700 x 400 x 360 mm
Weight35-38 kg
Warranty5 years
Hot water flow rate15.6 litres per minute

Figures taken from an established dealer: source. Specifications change by model year and configuration - confirm with the supplier before relying on them.

Who uses it

A gas combi boiler with 31.7 kW of hot water output, sized for a three-bed house with one or two bathrooms. It delivers about 15.6 litres per minute of hot water, which decides how well a shower runs while a tap is on. Warranty: 5 years. Seasonal efficiency is 98%.

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Other Viessmann models

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