Commonly used for return air in side walls and ceilings without need of an opposed blade damper since return air is not normally room balanced. Available with either vertical or horizontal louvers or both, n aerofoil shape to reduce frictional loosed. Aluminum construction Aerofoil shape louvers Individually adjustable blades.
Contemporary interiors in large offices, public areas of hotels and hospitals call for uncluttered looking wall and false ceilings with linear grilles used for supply and return air. Available in any total length in sections of 1.2 to 1.8 meters with perfect alignment between sections. Removable louvers facilitate installation. Adjustable louvers installed in collars are recommended for vertical air pattern control. Aluminum construction Removable louvers 0 to 30 degree deflection.
Most desirable for supply air in wall locations. With aerofoil shape louvers i8n both horizontal and vertical directions, minor air motion problems can be quickly corrected by adjusting the vanes. An opposed blade damper installed behind the grill is used for adjusting air volumes during air balancing. Choice of horizontal louvers in front and vertical at the back or vice versa available.