Vaillant ecoTEC Plus 840 Combi Boiler

Vaillant ecoTEC Plus 840 Combi Boiler

The Vaillant ecoTEC Plus 840 Combi Boiler is a powerful, high-output heating and hot water solution, designed for larger homes with greater demand. As part of Vaillant’s latest ecoTEC Plus range, it combines advanced performance with a refined internal layout, giving installers easy access to all major components and making installation and servicing quicker and more efficient. This upgraded model features a modern semi-touch interface, offering a smooth and intuitive experience from the moment it’s installed. The guided commissioning wizard helps installers complete setup step-by-step, while the clear display and simple navigation make it easy for homeowners to manage their heating and hot water. With its familiar footprint, pipe connections, and flue positioning, it’s also ideal for straightforward replacement of older Vaillant boilers. Performance is enhanced through cutting-edge technology. IoniDETECT continuously monitors gas combustion, allowing the boiler to operate across a wide modulation range of up to 1:10. This means it can adapt precisely to heating demand, improving efficiency and helping to reduce energy consumption. linBUS technology further improves system accuracy by monitoring flow rate and pressure through the internal pump. Designed for flexibility and future-proofing, the ecoTEC Plus 840 is hydrogen-ready, meaning it can safely operate with up to a 20% hydrogen blend. It is also compatible with Vaillant’s full range of controls, flues, boiler protection kits, and renewable technologies, making it suitable for a wide variety of installations. In addition, it is smart home ready and can be connected to the myVAILLANT connect internet gateway for app-based control and remote access (additional equipment may be required).

Key Features & Benefits

Refined internal layout for easier installation and servicing Intuitive semi-touch interface with guided commissioning wizard IoniDETECT technology for intelligent combustion monitoring Wide modulation range (up to 1:10) for improved efficiency linBUS technology for enhanced system accuracy and performance Hydrogen-ready for up to 20% hydrogen blend Smart home ready with myVAILLANT connect (additional equipment required) Compatible with Vaillant controls, flues, and accessories Familiar footprint for easy replacement installations Up to 10-year warranty available with Vaillant Advance Installer

Technical Specifications

Product Type: Gas Combi Boiler Model: ecoTEC Plus 840 GTIN: 4024074906767 Height: 720 mm Width: 440 mm Depth: 386 mm Weight (Net): 40.5 kg Gross Weight: 43.5 kg Warranty: 5 years (extendable to 10 years with Vaillant Advance Installer)

Frequently Asked Questions

Is the ecoTEC Plus 840 suitable for large households?

Yes, this is one of the higher output combi boilers in the range, making it ideal for larger homes with higher heating and hot water demands.

Can this boiler be controlled remotely?

Yes, it is smart home ready and can be connected to the myVAILLANT connect gateway, allowing app-based control when used with compatible systems.

What makes this boiler future-proof?

It is hydrogen-ready and designed to work safely with up to a 20% hydrogen blend, helping prepare your home for future energy standards while maintaining high efficiency.