VAILL ECOTEC+ 835 NG ERP COMBI 10021822

The Vaillant ecoTEC plus 835 is a high‑efficiency, ErP‑compliant natural gas combination (combi) boiler designed to provide central heating and instantaneous domestic hot water without the need for a separate cylinder. Built for reliability and quiet performance, it is a compact, wall‑mounted unit suitable for modern homes where space saving and energy efficiency are priorities.

This condensing combi intelligently modulates its output to match demand, improving efficiency and comfort while reducing energy use. It comes ready for use with Vaillant’s eBUS controls and smart thermostats, supports standard horizontal or vertical flue options, and includes built‑in protections for straightforward, dependable operation.

• Brand: Vaillant
• Range: ecoTEC plus
• Model: 835 Combi (Natural Gas)
• ErP compliant, high‑efficiency condensing technology
• Instantaneous hot water and central heating from one compact unit
• Wall‑mounted design suitable for space‑conscious installations
• Automatic output modulation for energy‑efficient operation
• Compatible with Vaillant eBUS controls and smart thermostats
• Built‑in frost protection and diagnostics for reliable performance
• Flue options: horizontal and vertical (accessories available separately)
• Fuel: Natural Gas (NG)
• Manufacturer part number: 10021822