Viessmann
Vitodens 100-W 35kW combi
Gas combi boiler, 34.9 kW hot water output
Last reviewed 13 September 2026
Specifications
| Hot water output | 34.9 kW |
| Central heating output | 32 kW |
| ErP class | A |
| Seasonal efficiency | 98% |
| Dimensions | 700 x 400 x 360 mm |
| Weight | 35 kg |
| Warranty | 5 years |
| Hot water flow rate | 17 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 34.9 kW of hot water output, sized for a larger house with two bathrooms. It delivers about 17 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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