Aluminum line grille with 3 adjustable perforated panels – 500 mm – RAL 9016 + insulated plenum with airflow control damper

Aluminium linear diffuser with 3 adjustable pattern blades – 500 mm – RAL 9016 + insulated plenum with air volume 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 a comfortable and draft-free air distribution is essential, such as larger office areas, retail spaces, restaurants, and commercial buildings. The linear diffuser is made of extruded aluminium; the plenum is constructed from galvanised steel with sound-absorbing insulation. Both components are designed to work seamlessly together: the plenum distributes the supply air evenly along the entire slot length of 500 mm, while the linear diffuser precisely directs the airflow across the slot width via three adjustable deflector blades. The three-slot design delivers a high airflow rate while maintaining excellent air distribution and a low noise level. 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 hardware: The plenum and linear diffuser are designed to operate together and come with the required mounting bracket and Allen screws.
• Quiet operation due to sound-absorbing insulation: The insulated plenum dampens noise from the ductwork, minimising sound disturbance.
• Precisely adjustable airflow: The integrated air volume control damper enables accurate balancing during commissioning.
• Draft-free air distribution via 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 mounting bracket. For connection, the air intake deflector is rotated 90°, after which the diffuser can be easily attached from underneath to the plenum. The plenum then connects to the ventilation duct via a round connection. Thanks to its compact installation height, the set also fits ceilings with limited available space. Once installed, the diffuser’s deflectors can be manually adjusted for horizontal or vertical discharge direction. This set is suitable for use in offices, retail stores, schools, restaurants, hotels, and other commercial buildings.