Good points

Airtight 90° connection
Zeta 1.15 - low pressure loss
Includes Click-Seal rings
Tool-free assembly

Ubbink Air Excellent 23C 90° Elbow Coupling

The Ubbink Air Excellent 23C 90° elbow coupling is used to connect two 23C ducts at a right angle within the Air Excellent air distribution system. This elbow enables a controlled 90-degree change of direction without compromising airtightness or system performance. The set includes two 23C Click-Seal rings, allowing you to create a secure, tool-free connection immediately.

Advantages and Features

Airtight connection: The Click-Seal rings ensure a reliable seal, preventing unwanted air leakage within the duct run.
Optimised airflow guidance: With a zeta value of 1.15, pressure loss remains manageable, even at higher air volumes.
Quick, tool-free installation: The click system allows for efficient on-site assembly.
Antistatic and antimicrobial: The material supports a hygienic ventilation system and reduces dust adhesion.
TÜV SÜD certified: Tested for quality and safety in ventilation applications.

Performance and Practical Use

The elbow has an external diameter of 63 mm and is designed for stable airflow in both supply and exhaust conditions. The zeta value of 1.15 provides predictable pressure loss within the system. At an airflow rate of 30 m³/h, the pressure loss is approximately 2.4 Pa at one connection. This allows precise dimensioning of the entire ductwork while maintaining the efficiency of the ventilation unit. The temperature resistance from -20 °C to +60 °C makes the elbow suitable for installation in floors, walls, and unheated spaces. With dimensions of 133 x 133 x 74 mm, the installation remains compact and easy to plan.

Installation and Applications

The 23C 90° elbow set is suitable for situations where the duct must be routed around structural elements or where space is restricted. Thanks to its lightweight of approximately 0.08 kg, installation is comfortable—even above ceilings or inside technical shafts. The Euroclass E fire rating aligns with common requirements in residential construction projects. The secure fit within the 23C system ensures a stable, low-maintenance connection throughout the installation’s lifespan.

This 90-degree elbow allows controlled airflow direction within the ventilation system while combining ease of installation with reliable, predictable performance.