Aluminum line grille with 2 adjustable perforated panels – 1250 mm – RAL 9005 + insulated plenum with airflow control damper

Aluminium Linear Diffuser with 2 Adjustable Pattern Blades – 1250 mm – RAL 9005 + Insulated Plenum with Airflow Control Damper

The combination of the insulated plenum and the aluminium linear diffuser with two adjustable pattern blades forms a complete set for quiet, even air supply in spaces where comfortable, draught-free air distribution is desired, such as offices, retail stores, meeting rooms, and hotel lobbies. The linear diffuser is made from extruded aluminium in RAL 9005; the plenum is constructed from galvanised steel with sound-absorbing insulation. Both components are coordinated and function as a single unit: the plenum evenly distributes the supply air across the full slot length of 1250 mm, while the diffuser evenly distributes the airflow through two adjustable deflector profiles. The dual-slot design allows for higher air volumes at a low noise level. Thanks to the Coanda effect, the air spreads along the ceiling without causing draughts, ensuring a comfortable indoor climate in the occupied zone.

Benefits and Features

• Complete set, including mounting hardware: The plenum and linear diffuser are designed to work together and are delivered with the necessary mounting bracket and Allen screws.
• Quiet operation due to sound-absorbing insulation: The insulated plenum reduces noise from the duct and minimizes sound disturbance.
• Precisely adjustable airflow: The integrated airflow control damper allows fine-tuning during balancing.
• Draught-free air distribution via Coanda effect: The linear diffuser directs air along the ceiling, ventilating the occupied zone comfortably without direct air jets.
• Higher air capacity with low noise level: Two parallel deflector profiles enable higher flow rates without noticeable increase in noise generation.

Installation and Applications

The linear diffuser is mounted from below onto the plenum using the supplied galvanised mounting bracket. For connection, the air inlet deflector is rotated 90°, after which the diffuser is easily attached from below to the plenum. The plenum then connects to the ventilation duct via a circular connection. Thanks to the compact build height, the set also fits into ceilings with limited free space. After installation, the diffuser deflectors can be manually adjusted for horizontal or vertical airflow direction. The set is suitable for offices, shops, schools, restaurants, hotels, and other commercial buildings.