Aluminum line grille with 2 adjustable perforated panels – 1000 mm – RAL 9005 + insulated plenum with airflow control damper

Aluminium Linear Diffuser with 2 Adjustable Deflector Blades – 1000 mm – RAL 9005 + Insulated Plenum with Airflow Control Damper

The combination of the insulated plenum and the aluminium linear diffuser with two adjustable deflector blades forms a complete solution for silent, even air distribution in spaces where comfortable and draught-free ventilation is required, 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 galvanised steel with sound-absorbing insulation. Both components are precisely matched and function as a single unit: the plenum evenly distributes the supply air along the entire 1000 mm slot length, while the linear diffuser evenly disperses the airflow through two adjustable deflector profiles. The dual-slot design allows for higher airflow rates at a low noise level. Thanks to the Coanda effect, the air flows along the ceiling without draught, ensuring a comfortable indoor climate in the occupied zone.

Advantages and Features

• Complete set including mounting hardware: The plenum and linear diffuser are designed to work together and come supplied with the necessary mounting bridge and Allen screws.
• Quiet operation due to sound-absorbing insulation: The insulated plenum attenuates noise from the ductwork, minimising sound disturbances.
• Precisely adjustable airflow: The integrated airflow control damper enables exact balancing during system commissioning.
• Draught-free air distribution via Coanda effect: The linear diffuser directs air along the ceiling, ventilating the occupied zone comfortably without direct air jets.
• Higher airflow capacity at low noise levels: Two parallel deflector profiles allow higher air volumes without significant noise increase.

Installation and Applications

The linear diffuser is mounted from below onto the plenum using the supplied galvanised mounting bridge. For connection, the air inlet deflector is rotated 90°, after which the diffuser is easily fixed from underneath onto the plenum. The plenum then connects to the ventilation duct via a round flange. Thanks to its compact build height, the set fits into ceilings with limited clearance. After installation, the diffuser’s deflectors can be manually adjusted to provide horizontal or vertical airflow direction. This set is suitable for use in offices, retail shops, schools, restaurants, hotels, and other commercial buildings.