Aluminum line grille with 2 adjustable perforated panels – 1250 mm – RAL 9016 + insulated plenum with airflow control damper

Aluminium Linear Grille with 2 Adjustable Blade Plates – 1250 mm – RAL 9016 + Insulated Plenum with Airflow Control Damper

The combination of the insulated plenum and the aluminium linear grille with two adjustable blade plates forms a complete system for quiet, uniform air supply in spaces where comfortable and draught-free air distribution is desired, such as offices, retail outlets, meeting rooms, and hotel lobbies. The linear grille is made of extruded aluminium; the plenum of galvanised steel with sound-absorbing insulation. Both components are matched and work as one unit: the plenum distributes the supply air evenly across the entire slot length of 1250 mm, while the linear grille evenly distributes the airflow through two adjustable deflector profiles. The dual-slot design allows higher air volumes at a low noise level. Thanks to the Coanda effect, the air spreads along the ceiling without draughts, ensuring a comfortable indoor climate in the occupied zone.

Benefits and Features

• Complete set including fixings: The plenum and linear grille are designed to work seamlessly together and are supplied with the required mounting bracket and hex screws.
• Quiet operation through sound-absorbing insulation: The insulated plenum reduces noise from the ductwork, minimising sound disturbances.
• Precisely adjustable airflow: The integrated airflow control damper allows for accurate balancing during the commissioning phase.
• Draught-free air distribution via Coanda effect: The linear grille directs the air along the ceiling, ventilating the occupied area comfortably without direct air jets.
• Higher air capacity with low noise level: Two parallel operating deflector profiles enable higher air volumes without a noticeable increase in noise generation.

Installation and Applications

The linear grille 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 grille can be easily fixed from underneath onto the plenum. The plenum then connects to the ventilation duct via a circular connection. Due to the compact build height, the set fits in ceilings with limited free space. After installation, the deflectors on the linear grille can be manually adjusted for horizontal or vertical airflow direction. The set is suitable for use in offices, shops, schools, restaurants, hotels, and other commercial buildings.