Aluminum line grille with 3 adjustable perforated panels – 1500 mm – RAL 9016 + insulated plenum with airflow control damper

Aluminium Linear Diffuser with 3 Adjustable Pattern Blades – 1500 mm – RAL 9016 + Insulated Plenum with Airflow Control Damper

The combination of the insulated plenum and aluminium linear diffuser with three adjustable pattern blades forms a complete set for quiet, uniform air supply in spaces where comfortable, draught-free air distribution is desired, such as larger offices, retail areas, restaurants, and commercial buildings. The linear diffuser is made from extruded aluminium; the plenum is constructed from galvanised steel with sound-absorbing insulation. Both components are perfectly matched and function as a single unit: the plenum evenly distributes the supply air along the entire slot length of 1500 mm, while the linear diffuser precisely directs the airflow across the slot width via three adjustable deflector profiles. The three-slot design provides a high volume flow while maintaining excellent air distribution and low noise levels. Thanks to the Coanda effect, the air spreads along the ceiling without draughts, creating 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 fixing bracket and hex screws.
• Quiet operation through sound-absorbing insulation: The insulated plenum attenuates noise from the duct, minimising sound nuisance.
• Precisely adjustable airflow: The integrated airflow control damper allows for fine-tuning during the commissioning phase.
• Draught-free air distribution via Coanda effect: The linear diffuser directs the air along the ceiling, ensuring the occupied zone is ventilated comfortably without direct airflow drafts.
• High volume flow with uniform distribution: Three profiles guarantee even air supply along the full slot length, even at higher volumetric flows.

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 to the plenum from beneath. The plenum then connects to the ventilation duct via a round connection. Thanks to its compact installation depth, the set also fits 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.