Steel ventilation grill TR

rectangular

Ventilation grille with droplet shaped blades Nominal sizes 225 × 125 – 1225 × 525 mm Volume flow rate range 23 – 2000 l/s or 83 – 7200 m³/h Grille face made of sheet steel, powder-coated Front border with countersunk holes, 27 mm wide Grille face in RAL CLASSIC colours Grille face made of galvanised sheet steel, without powder coating Installation subframe Installation subframe for fitting filter media Attachments for volume flow rate balancing and air direction control Concealed screw fixing Ventilation grilles are air terminal devices for the supply air and extract air of ventilation and air conditioning systems. They direct the supply air into the room. Ventilation grilles with adjustable blades allow for adapting the discharge direction to the local conditions. The result is a mixed flow ventilation in comfort zones and industrial zones, with good overall room ventilation. Induction slows the airflow down, i.e. the airflow velocity decreases as the distance from the grille increases. The distance at which the airflow velocity reaches a certain defined value, e.g. 0.2 m/s, is called throw distance. The supply air jet from wall grilles that are installed near the ceiling achieves a larger throw distance than a free jet (from a grille that is not installed near the ceiling). Single grilles, groups of grilles and continuous horizontal runs all achieve different throw distances.