Vaillant Ecotech 635 System Boiler with Horizontal Flue & 15mm Scale Reducer

The Vaillant ecoTEC Plus 635 System Boiler is a high-performance 35kW system gas boiler designed for larger homes with higher heating demands. Built for sealed central heating systems with a separate unvented hot water cylinder, it combines Vaillant's latest condensing technology with intelligent combustion management to deliver powerful, efficient, and reliable home heating. Featuring an upgraded internal layout, intuitive semi-touch controls, and advanced smart technology, the ecoTEC Plus 635 is designed to simplify installation, commissioning, and servicing while providing long-term energy efficiency. Compatible with Vaillant controls, flue systems, and renewable heating solutions, it offers a...