Aluminum line grille with 2 adjustable perforated panels – 500 mm – RAL 9010 + insulated plenum with airflow control damper

Aluminium linear grille with 2 adjustable blade pattens – 500 mm – RAL 9010 + insulated plenum with air volume control damper

The combination of the insulated plenum and aluminium linear grille with two adjustable blade pattens forms a complete unit for quiet, even air supply in spaces where a comfortable and draught-free air distribution is desired, such as offices, retail, meeting rooms and hotel lobbies. The linear grille is made from extruded aluminium in RAL 9010; the plenum is constructed from galvanised steel with sound-absorbing insulation. Both components are matched and operate as one system: the plenum evenly distributes the supply air along the full slot length of 500 mm, while the linear grille evenly distributes the airflow via two adjustable deflector profiles. The twin-slot design allows for higher airflow rates at low noise levels. Thanks to the Coanda effect, the air disperses along the ceiling without draughts, ensuring a comfortable indoor climate within the occupied zone.

Benefits and features

• Complete set, including mounting accessories: The plenum and linear grille are designed to work together and are delivered with the required mounting bracket and hex screws.
• Quiet operation due to sound-absorbing insulation: The insulated plenum attenuates noise from the duct and minimises sound disturbance.
• Precisely adjustable airflow: The integrated air volume control damper allows accurate regulation during commissioning.
• Draught-free air distribution via Coanda effect: The linear grille directs the air along the ceiling, ventilating the occupied zone comfortably without direct air jets.
• Higher airflow capacity at low noise levels: Two parallel deflector profiles enable higher air volumes without a noticeable increase in noise production.

Installation and applications

The linear grille is mounted from underneath onto the plenum using the supplied galvanised mounting bracket. The air inlet deflector is rotated 90° for connection, after which the grille is easily attached from below to the plenum. The plenum then connects via a round outlet to the ventilation duct. Thanks to its compact installation height, the set also fits ceilings with limited free space. After installation, the deflectors of the linear grille can be manually adjusted for either horizontal or vertical airflow direction. The set is suitable for use in offices, shops, schools, restaurants, hotels and other commercial buildings.