Aluminum line grille with 2 adjustable perforated panels – 1250 mm – RAL 9010 + insulated plenum with airflow control damper

Aluminium linear grille with 2 adjustable deflector blades – 1250 mm – RAL 9010 + insulated plenum with airflow control damper

The combination of the insulated plenum and aluminium linear grille with two adjustable deflector blades forms a complete solution for quiet, uniform air supply in spaces where comfortable, draught-free air distribution is essential, such as offices, retail areas, meeting rooms and hotel lobbies. The linear grille is made of extruded aluminium in RAL 9010; the plenum is constructed from galvanised steel with sound-absorbing insulation. Both components are perfectly matched and function as a single unit: the plenum distributes the supply air evenly along the entire slot length of 1250 mm, while the linear grille distributes the airflow evenly through its two adjustable deflector profiles. The two-slot design enables higher air volumes at a low noise level. Thanks to the Coanda effect, the air spreads along the ceiling without creating draughts, ensuring a comfortable indoor climate in the occupied zone.

Benefits and features

• Complete set, including mounting accessories: The plenum and linear grille are designed to work together and are supplied with the required 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 control damper allows accurate adjustment during commissioning.
• Draught-free air distribution via the Coanda effect: The linear grille directs the air along the ceiling, ventilating the occupied zone comfortably without direct air jets.
• Higher air capacity at low noise levels: Two parallel deflector profiles enable higher airflow rates without noticeable noise increase.

Installation and applications

The linear grille 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 grille is easily attached from below onto the plenum. The plenum then connects to the ventilation duct via a circular connection. Thanks to the compact installation height, the set also fits ceilings with limited free space. After installation, the linear grille deflectors 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.