Aluminum line grille with 2 adjustable perforated panels – 1500 mm – RAL 9005 + insulated plenum with airflow control damper

Aluminium Linear Diffuser with 2 Adjustable Pattern Blades – 1500 mm – RAL 9005 + Insulated Plenum with Airflow Control Damper

The combination of the insulated plenum and aluminium linear diffuser with two adjustable pattern blades provides a complete set for silent, uniform air supply in spaces where comfortable, draught-free air distribution is desired, such as offices, retail environments, meeting rooms, and hotel lobbies. The linear diffuser is made of extruded aluminium in RAL 9005; the plenum is constructed from galvanized steel with sound-absorbing insulation. Both components are designed to work in harmony as a single unit: the plenum evenly distributes the supply air along the full slot length of 1500 mm, while the linear diffuser uniformly directs the air through two adjustable deflector profiles. The dual-slot design enables higher airflow rates at a low noise level. Thanks to the Coanda effect, the air spreads along the ceiling without causing draughts, ensuring a comfortable indoor climate within the occupied zone.

Benefits and Features

• Complete set including mounting hardware: The plenum and linear diffuser are designed to work together and are supplied with the necessary mounting bracket and Allen screws.
• Quiet operation due to sound-absorbing insulation: The insulated plenum dampens noise from the duct while 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 diffuser directs air along the ceiling to ventilate the occupied zone comfortably without direct air jets.
• Higher air capacity at low noise levels: Two parallel operating deflector profiles allow higher flow rates without noticeable increases in noise production.

Installation and Applications

The linear diffuser is mounted from underneath onto the plenum using the supplied galvanized mounting bracket. For connection, the air inlet bend is rotated 90°, after which the diffuser is easily attached from below onto the plenum. The plenum then connects via a round connection to the ventilation duct. Thanks to its compact build height, the set also fits into ceilings with limited free space. After installation, the diffuser’s deflectors can be manually adjusted to direct airflow horizontally or vertically. This set is suitable for use in offices, retail stores, schools, restaurants, hotels, and other commercial buildings.