The Vaillant ecoTEC Plus 835 combination boiler is suitable for medium to large sized homes with up to 2 bathrooms and an en-suite. Attractive in design and quiet in operation, this 35kW boiler delivers superb performance using Vaillants innovative AquaComfort system to provide instant hot water at a constant temperature.

Innovative new electronic gas and air modulation system for a cleaner, lower emission combustion

New higher efficiency pump for reduced energy consumption and lower standby losses Flame lift detection system for more efficient and quieter combustion

Stylish new case and control panel design for enhanced appearance

Standard 5 year warranty extended to 7 years when installed by a Vaillant Advance installer