Vaillant Ecotech 412 Heat Only with Horizontal Flue & 15mm Scale Reducer

The Vaillant ecoTEC Plus 412 Open Vent Boiler is a compact, high-efficiency heat-only boiler designed for traditional open-vented heating systems. Delivering a 12kW central heating output, it is an ideal replacement for older regular boilers, providing reliable performance, exceptional energy efficiency, and straightforward installation.

Designed with Vaillant's renowned engineering, the ecoTEC Plus 412 combines intelligent controls, quiet operation, and advanced condensing technology to help reduce energy consumption while maintaining consistent heating throughout your home. Its compact dimensions make it suitable for installation in kitchens, airing cupboards, or utility rooms where space is limited.

Key Features

• 12kW heat-only (open vent) boiler
• Designed for traditional open-vented heating systems
• Compact wall-mounted design
• High-efficiency condensing technology
• ErP A Rated for heating efficiency
• Built-in two-stage frost protection
• Push-button controls with clear diagnostic display
• Compatible with the full range of Vaillant heating controls
• Excellent siting flexibility for easier installation
• Quiet and reliable operation
• Ideal replacement for older regular boilers

Designed for Traditional Heating Systems

The ecoTEC Plus 412 is specifically designed for homes with an existing open-vented central heating system, making it an excellent upgrade without requiring major changes to your current pipework or heating layout.

Its compact size allows it to fit neatly into a wide range of installation locations while delivering dependable heating performance throughout the home.

High Efficiency Heating

Featuring advanced condensing technology, the ecoTEC Plus 412 automatically adjusts its heating output to match the demands of your property. This intelligent modulation helps reduce gas consumption while maintaining comfortable indoor temperatures and lowering energy bills.

With a heating output range of approximately 4.7–12.8kW (condensing mode), the boiler operates efficiently even during periods of lower heating demand.

Easy to Install and Maintain

The ecoTEC Plus 412 has been engineered with installers in mind. Its lightweight construction, compact dimensions, and flexible pipe connections help simplify installation, while the intuitive control panel provides comprehensive operating and diagnostic information for easier servicing.

The boiler measures approximately:

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

Intelligent Heating Control Compatibility

The ecoTEC Plus 412 is fully compatible with Vaillant's range of intelligent heating controls and accessories, allowing homeowners to improve comfort while optimising energy efficiency. It can also be integrated into hybrid heating systems alongside selected renewable heating technologies.

Built for Year-Round Reliability

The integrated two-stage frost protection system helps safeguard the boiler during colder weather, while Vaillant's proven engineering ensures dependable performance throughout every season. Advanced onboard diagnostics also make monitoring and maintenance simpler for heating engineers.

Warranty & Peace of Mind

The Vaillant ecoTEC Plus 412 includes a 5-year manufacturer's warranty as standard. When installed by an eligible Vaillant Advance Installer, the warranty may be extended, subject to Vaillant's current terms and conditions, providing added confidence in your investment.

Why Choose the Vaillant ecoTEC Plus 412?

• Ideal upgrade for traditional open-vented systems
• Compact, space-saving design
• High-efficiency condensing performance
• Quiet and reliable operation
• Easy installation and servicing
• Smart control compatibility
• Advanced frost protection
• Trusted Vaillant engineering
• Excellent long-term energy efficiency
• Reliable heating for everyday comfort