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Vaillant

ecoTEC plus 825 25kW combi

Gas combi boiler, 25.4 kW hot water output

Last reviewed 13 September 2026

Specifications

Hot water output25.4 kW
Central heating output20.8 kW
ErP classA
Seasonal efficiency94%
Dimensions720 x 440 x 338 mm
Weight36 kg
Warranty10 years with Vaillant Advance Boiler Protection Kit
Hot water flow rate10.5 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 25.4 kW of hot water output, sized for a flat or small house with one bathroom. It delivers about 10.5 litres per minute of hot water, which decides how well a shower runs while a tap is on. Warranty: 10 years with Vaillant Advance Boiler Protection Kit. Seasonal efficiency is 94%.

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GetBrent is an independent directory and is not a dealer for, nor affiliated with, Vaillant. Model and brand names are the trademarks of their owners, used here only to identify the products they refer to.