Aluminum line grille with 3 adjustable perforated panels – 500 mm – RAL 9005 + insulated plenum with airflow control damper

Aluminium Linear Diffuser with 3 Adjustable Pattern Blades – 500 mm – RAL 9005 + 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 office areas, retail spaces, restaurants, and commercial buildings. 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 a single unit: the plenum evenly distributes the supply air along the full slot length of 500 mm, while the diffuser precisely directs the airflow over the slot width via three adjustable deflector profiles. The three-slot design delivers 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 drafts, ensuring a comfortable indoor climate in the occupied zone.

Benefits and Features

• Complete set, including mounting accessories: The plenum and linear diffuser are designed to work together and are supplied with the necessary mounting bracket and hex screws.
• Quiet operation due to sound-absorbing insulation: The insulated plenum reduces noise originating from the ductwork, minimising sound disturbance.
• Precisely adjustable airflow: The integrated airflow control damper allows for accurate balancing during the commissioning phase.
• Draught-free air distribution via the Coanda effect: The linear diffuser directs the air along the ceiling, ventilating the occupied zone comfortably without direct air jets.
• High flow rate with uniform distribution: Three blades ensure an even air supply over the entire 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 simply attached from underneath to the plenum. The plenum then connects to the ventilation duct via a round connection. Thanks to its compact build height, the set is also suitable for ceilings with limited free space. After installation, the diffuser blades can be manually adjusted for horizontal or vertical airflow direction. This set is suitable for use in offices, retail stores, schools, restaurants, hotels, and other commercial buildings.