Good points

For air distribution box 125/500
Airtight connection
Includes Click-Seal rings
Tool-free assembly

Ubbink Air Excellent 23C Coupling Piece for DBOX Air Distribution Box 125/500

The Air Excellent DBOX 23C coupling piece is used to connect a 23C duct to a Ubbink air distribution box series 125/500. This set enables a direct and airtight transition between the round Ø125 internal connection point and the flat 23C duct. The set is supplied including two 23C Click-Seal rings, allowing you to quickly and tool-freely create a reliable connection.

Advantages and Features

Airtight connection between DBOX and 23C: Ensures a sealed system without unwanted air leakage.
Optimised pressure loss: Zeta 1.9 for supply and 0.8 for extract, tailored for efficient air distribution.
Tool-free installation: Quick assembly thanks to the click system and integrated Click-Seal rings.
Antistatic and antimicrobial: Supports a hygienic ventilation system.
TÜV SÜD certified: Tested for quality and safety within ventilation applications.

Performance and Practical Application

The set is designed for stable airflow in both supply and extract. The different zeta values for supply and extract provide insight into the expected pressure loss within the system. At an airflow rate of 30 m³/h, the pressure loss at a single connection is approximately 14.5 Pa for supply and 7.3 Pa for extract. This allows precise dimensioning of the duct path and ventilation unit. The coupling piece is temperature resistant from -20 °C to +60 °C and complies with fire class Euroclass E. With compact dimensions of 109 x 95 x 95 mm, the installation remains neat even in confined spaces.

Installation and Applications

This set is applied when connecting a distribution box to a 23C duct leading to valves or other branches. Thanks to the light weight of approximately 0.075 kg, you can work comfortably above ceilings or in technical shafts. The fixed fit within the Air Excellent system ensures a stable and low-maintenance connection throughout the installation’s lifespan.

With this set, you achieve a technically sound transition between DBOX and duct system, combining ease of installation with predictable aerodynamic performance.