Aluminum line grille with 2 adjustable perforated panels – 500 mm – RAL 9005 + insulated plenum with airflow control damper

Aluminium Linear Diffuser with 2 Adjustable Blade Plates – 500 mm – RAL 9005 + Insulated Plenum with Airflow Control Damper

The combination of the insulated plenum and the aluminium linear diffuser with two adjustable blade plates forms a complete system for quiet, even air supply in spaces where comfortable, draught-free air distribution is desired, such as offices, retail environments, meeting rooms, and hotel lobbies. The linear diffuser is made of extruded aluminium in RAL 9005; the plenum is constructed from galvanised steel with sound-absorbing insulation. Both components are coordinated and function as one unit: the plenum evenly distributes supply air along the entire 500 mm slot length, while the linear diffuser uniformly directs the airflow via 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 flows along the ceiling without 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 come with the necessary mounting bracket and Allen screws.
• Silent operation due to sound-absorbing insulation: The insulated plenum dampens noise from the ductwork, minimising sound disturbance.
• Precisely adjustable airflow: The built-in airflow control damper enables accurate balancing during commissioning.
• 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 at low noise levels: Two parallel deflector profiles allow higher air volumes 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 duct connection, the inlet elbow is rotated 90°, after which the diffuser is easily attached under the plenum. The plenum then connects to the ventilation duct via a round connection. Thanks to its compact build height, the set fits even in 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 use in offices, shops, schools, restaurants, hotels, and other commercial buildings.