Aluminum line grille with 3 adjustable perforated panels – 1500 mm – RAL 9005 + insulated plenum with airflow control damper

Aluminium Linear Diffuser with 3 Adjustable Pattern Blades – 1500 mm – RAL 9005 + Insulated Plenum with Airflow Control Damper

The combination of the insulated plenum and the aluminium linear diffuser with three adjustable pattern blades forms a complete set for quiet, even air supply in spaces where comfortable, draught-free air distribution is desired, such as larger office areas, retail spaces, restaurants, and commercial buildings. The linear diffuser is made from extruded aluminium in RAL 9005; the plenum is fabricated from galvanised steel with sound-absorbing insulation. Both components are matched and operate as a single unit: the plenum distributes the supply air evenly 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 delivers a high airflow rate while maintaining excellent air distribution and low noise levels. Thanks to the Coanda effect, air flows along the ceiling without draughts, ensuring a comfortable indoor climate within the occupied zone.

Advantages and Features

• Complete set, including mounting hardware: The plenum and linear diffuser are designed to work together and come supplied with the necessary fixing brackets and Allen screws.
• Quiet operation due to sound-absorbing insulation: The insulated plenum reduces noise from the duct, minimising sound disturbance.
• Precisely adjustable airflow: The integrated airflow control damper allows for accurate calibration during commissioning.
• Draught-free air distribution via the Coanda effect: The linear diffuser directs air along the ceiling, ventilating the occupied zone comfortably without direct air jets.
• High airflow with uniform distribution: Three profiles ensure even air supply across the entire slot length, even at higher volume flows.

Installation and Applications

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