The Vaillant ecoTEC Plus 836 Combi Boiler delivers high-performance, efficient heating for existing homes, helping to reduce energy use and bills.

Its intelligent modulation adjusts power to demand, using as little as 16% of maximum output when full heat is not required. Easy-to-use smart controls and app compatibility provide convenient control, while cascade capability makes it suitable for larger properties.

• Suitable for existing buildings with centralised or decentralised heating
• 36kW combi boiler for efficient domestic heating and hot water
• Modulates down to 16% of maximum power to help reduce fuel use
• Precision heating designed to help lower energy bills
• Smart controls for easy operation
• Compatible with app-based control
• Can be installed in cascade systems for larger properties