Good points

For air distribution box 200/800
Airtight connection
Includes Click-Seal rings
Tool-free assembly

Ubbink Air Excellent 48C Coupling for DBOX Air Distribution Box 200/800

The Air Excellent DBOX 48C coupling is used to seamlessly connect a 48C duct to a Ubbink air distribution box series 200/800. This set is ideal for situations where you require a compact, airtight, and technically sound connection between the distribution box and ductwork. Thanks to the two included 48C Click-Seal rings, installation is quick and done without additional sealing materials.

Benefits and Features

Seamless connection to DBOX: Creates a fully integrated link between the distribution box and duct, eliminating loose or improvised joints.
Airtight with low pressure loss: With zeta values of 0.7 for supply and 0.9 for exhaust, additional resistance is kept minimal, maintaining precise control over the design airflow rate.
Tool-free installation: The Click-Seal system accelerates assembly and reduces the chance of installation errors.
Anti-static and antimicrobial: This design supports hygienic air distribution and reduces dust accumulation within the system.

Performance in Practice

A proper connection between the DBOX and duct significantly influences the total pressure loss of the system. At an airflow of 50 m³/h, the pressure loss is approximately 4.1 Pa for supply and 5.2 Pa for exhaust per connection. With two connections, the pressure loss per duct remains considerably lower, offering flexibility in ventilation system design.

The connection set is suitable for temperatures ranging from -20 °C to 60 °C and complies with fire resistance Euroclass E. With compact dimensions of 122 mm length and 101 mm width, this set easily integrates into technical spaces or ceilings. Its light weight of approximately 0.096 kg ensures comfortable and stable installation.

Installation and Maintenance

The connection set is installed directly between the DBOX and the 48C duct by simply clicking the joint into place. Since no sealant or tape is required, installation is faster and more consistent onsite. The fixed mechanical seal remains durable and low-maintenance throughout the ventilation system’s lifetime.

With this connection set, you achieve a compact, airtight, and technically reliable link between the distribution box and duct, with installation convenience and controlled system performance as key priorities.