Aluminum line grille with 3 adjustable perforated panels – 1250 mm – RAL 9005 + insulated plenum with airflow control damper

Aluminium Linear Diffuser with 3 Adjustable Blade Patterns – 1250 mm – RAL 9005 + Insulated Plenum with Airflow Regulating Damper

The combination of the insulated plenum and the aluminium linear diffuser with three adjustable blade patterns forms a complete system for quiet, uniform air supply in spaces where comfortable and draught-free air distribution is desired, such as larger office areas, retail spaces, restaurants, and commercial buildings. The linear diffuser is manufactured from extruded aluminium in RAL 9005; the plenum is made from galvanised steel with sound-absorbing insulation. Both components are coordinated and function as a single unit: the plenum evenly distributes the supply air over the entire slot length of 1250 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 airflow volume while maintaining excellent air distribution and low noise levels. Thanks to the Coanda effect, the air flows 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 come with the necessary mounting bracket and hex screws.
• Quiet operation due to sound-absorbing insulation: The insulated plenum attenuates noise originating from the duct, minimising sound disturbance.
• Precisely adjustable airflow: The integrated airflow regulating damper enables exact balancing during commissioning.
• Draught-free air distribution using the Coanda effect: The linear diffuser directs the air along the ceiling, ensuring comfortable ventilation of the occupied zone without direct air jets.
• High airflow with uniform distribution: Three profiles ensure even air supply across the entire slot length, even at higher air volumes.

Installation and Applications

The linear diffuser is mounted from underneath 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 round connection. Thanks to its compact build height, the set also fits into ceilings with limited free space. After installation, the diffuser blades can be manually adjusted for horizontal or vertical airflow direction. The set is suitable for use in offices, retail stores, schools, restaurants, hotels, and other commercial buildings.