Vaillant Ecotech 418 Heat Only with Horizontal Flue & 15mm Scale Reducer

The Vaillant ecoTEC Plus 418 Open Vent Boiler is a high-efficiency 18kW heat-only gas boiler designed for traditional open-vented central heating systems. Built with advanced condensing technology, it delivers dependable heating performance, excellent energy efficiency, and quiet operation for homes using a separate hot water cylinder and cold water storage tank.

Ideal for replacing older regular boilers, the ecoTEC Plus 418 features a compact wall-mounted design, intelligent heating controls, and flexible installation options, making it an excellent choice for homeowners looking for reliable, energy-efficient heating.

Key Features

• 18kW heat-only (Open Vent) gas boiler
• Designed for traditional open-vented heating systems
• Fuel Type: Natural Gas
• High-efficiency condensing technology
• ErP A Rated for heating efficiency
• Compact wall-mounted design
• Durable aluminium heat exchanger
• Built-in frost protection
• Quiet operation
• Compatible with Vaillant smart heating controls
• Digital display with intuitive controls
• Front-access components for easier servicing
• Ideal replacement for older regular boilers
• 5-year manufacturer's warranty (extendable to 10 years with a Vaillant Advance Installer)

Perfect for Traditional Heating Systems

The ecoTEC Plus 418 is specifically designed for homes with an existing open-vented central heating system, working alongside a separate hot water cylinder and cold water storage tank.

Unlike a combi boiler, this model is dedicated to central heating and does not produce domestic hot water instantly, making it ideal for larger heating systems where stored hot water is preferred.

Powerful 18kW Heating Performance

With an 18kW central heating output, the ecoTEC Plus 418 is well suited to medium-sized homes requiring dependable heating performance.

Its intelligent burner modulation adjusts output automatically to match heating demand, helping reduce gas consumption while maintaining comfortable indoor temperatures throughout the year.

The boiler offers a heating output range of approximately 5.2kW to 19.1kW in condensing mode, maximising seasonal efficiency.

Compact Installation

Despite its heating capacity, the ecoTEC Plus 418 maintains a compact footprint, making installation simple in kitchens, utility rooms, or airing cupboards.

Dimensions

• Height: 602mm
• Width: 375mm
• Depth: 320mm

Its lightweight construction also makes transportation and installation easier for heating engineers.

Energy Efficient Heating

Designed with Vaillant's advanced condensing technology, the ecoTEC Plus 418 achieves a 93% seasonal heating efficiency (ErP A Rated), helping homeowners reduce fuel consumption while maintaining consistent heating performance.

Smart Heating Control Compatibility

The ecoTEC Plus 418 is fully compatible with Vaillant's range of smart thermostats and heating controls, allowing homeowners to optimise heating schedules, improve efficiency, and increase everyday comfort.

It can also be integrated into selected hybrid heating systems alongside compatible renewable heating technologies.

Quiet, Reliable Performance

Engineered for long-term reliability, the ecoTEC Plus 418 operates quietly while delivering dependable central heating throughout every season.

Its front-access internal layout and onboard diagnostic system make servicing straightforward, helping reduce maintenance time and ensuring reliable long-term operation.

Warranty & Peace of Mind

The Vaillant ecoTEC Plus 418 is backed by a 5-year manufacturer's warranty as standard. When installed and registered by an eligible Vaillant Advance Installer, the warranty may be extended to 10 years, providing added confidence and long-term protection for your investment.

Why Choose the Vaillant ecoTEC Plus 418?

• Efficient 18kW heat-only gas boiler
• Ideal for traditional open-vented heating systems
• Compact wall-mounted design
• Durable aluminium heat exchanger
• High seasonal efficiency
• Quiet operation
• Smart heating control compatibility
• Easy installation and servicing
• Up to 10-year warranty available
• Trusted Vaillant engineering and long-term reliability