Good points

Airtight class ATC1
Limited pressure loss
Includes Click-Seal rings
Tool-free assembly

Ubbink Air Excellent 34C - 34C Passage Piece

The Air Excellent 34C - 34C passage piece is used to connect two 34C ducts in situations where the available installation height is limited. Thanks to its low build height of just 50 mm, you can route the ductwork around obstacles without unnecessarily increasing the overall package height. The set includes an adapter, two 34C sealing rings, and two 34C clip rings for a secure and airtight connection.

Benefits and Features

Minimal installation height
With a compact height of 50 mm, the passage piece can easily be applied in floors and ceilings with limited space.
Airtight connection class ATC1
The connection complies with airtightness class ATC1 according to EN14239, ensuring reliable system performance.
Low pressure loss
With a zeta value of approximately 1.97, the additional resistance in the duct run remains predictable and manageable.
Antistatic and antimicrobial
This design contributes to hygienic air distribution and reduces dust accumulation.

Performance in Practice

A compact duct passage prevents kinks or improvisations in the piping. At an airflow of 30 m³/h, the pressure loss is approximately 8.3 Pa, and at 50 m³/h about 23.0 Pa. This allows you to maintain insight into the resistance within the entire ventilation design and precisely size the system.

The passage piece measures 240 mm in length, 100 mm in width, and 85 mm in height. Weighing approximately 0.272 kg, it can be mounted securely and controllably within floor or ceiling constructions.

Installation and Maintenance

You install the passage piece directly between two 34C ducts and secure the connection with the supplied rings. Since no tape or sealant is required, you can work faster and more consistently on site. The mechanical seal remains durable and low-maintenance throughout the lifespan of the ventilation system.

With this 34C passage piece, you achieve a space-saving and airtight duct connection, tailored for compact installations with controlled system performance.