Aluminum line grille with 1 adjustable perforated panel – 1250 mm – RAL 9010 + insulated plenum with airflow control damper

Aluminium Linear Diffuser with 1 Adjustable Pattern Blade – 1250 mm – RAL 9010 + Insulated Plenum with Airflow Control Damper

The combination of the insulated plenum and the aluminium linear diffuser with a single adjustable pattern blade forms a complete solution for quiet, uniform air supply in spaces where comfortable, draught-free air distribution is required, such as offices, retail stores, restaurants, and hotels. The linear diffuser is made from extruded aluminium in RAL 9010; the plenum is constructed from galvanised steel with sound-absorbing insulation. Both components are matched and function as one: the plenum evenly distributes supply air along the full slot length of 1250 mm, while the linear diffuser precisely directs the airflow through the adjustable deflector profile. 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 fasteners: The plenum and linear diffuser are designed to work together and are supplied with the necessary fixing bracket and hex screws.
• Quiet operation due to sound-absorbing insulation: The insulated plenum attenuates noise from the duct, minimising sound disturbance.
• Accurately adjustable airflow: The integrated airflow control damper enables precise adjustment during the commissioning phase.
• Draught-free air distribution via the Coanda effect: The linear diffuser directs air along the ceiling, providing comfortable ventilation of the occupied zone without direct air jets.

Installation and Applications

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