Ventilation Crossover Duct and Duct Bridge

The ventilation crossover duct (also known as a duct bridge) is a specialized engineering component designed to resolve the technical challenge of two independent ventilation lines intersecting in the same plane. Its unique concave body profile allows one duct run to pass under or over another while maintaining a minimal total assembly thickness. This eliminates the need for significant lowering of suspended ceilings or raising floor screed levels. The unit is available in 1-way, 2-way, or 3-way configurations with three types of branch connections: galvanized steel (OC), plastic (PK), or rubber (GM).

Where is it used?

This crossover unit is essential for heat recovery ventilation (HRV) systems utilizing 75 mm semi-rigid radial ducting. It is indispensable in high-density service zones, narrow corridors, and central distribution areas where main supply/extract lines frequently cross paths with local branch runs. By using a crossover duct, installers can maintain a streamlined layout even in the most restricted architectural environments.

Design Features and Benefits

• Compact low-profile design: With a total casing height of only 85 mm and an effective crossover depth of up to 54 mm, the bridge helps preserve the effective volume and ceiling height of the premises.
• Structural durability: Manufactured from heavy-duty galvanized steel, the crossover is resistant to corrosion and capable of withstanding mechanical loads, making it suitable for concealed installation within concrete floor screeds or wall voids.
• Versatile configurations: The availability of single, double, or triple channel versions allows for precise matching with the specific project requirements and system airflow capacity.

Branch Connection Options

The branch material determines the fixing method and the long-term airtightness of the system:

• OC (Galvanized steel): Rigid metal branches for creating highly durable and mechanically stable connections.
• PK (Plastic): Equipped with polymer branches featuring integrated fixing rings for the rapid and secure attachment of 75 mm flexible ducts without specialized tools.
• GM (Rubber): Elastic rubber seals ensure a high-friction, airtight fit, providing a superior airtightness class and aiding in vibration isolation.

Technical Specifications

All models are fully compatible with standard 75 mm semi-rigid flexible ventilation ducts and are designed to minimize airflow resistance and pressure drop across the intersection.