One set of louver blades parallel to long dimension and individually adjustable for any degree of deflection.
Single Deflection Supply Air Registers shall be Holyoake Model SDL-20 and shall be of extruded aluminium construction, with 20mm True Airfoil Shaped individually adjustable Horizontal Front Blades of no greater than 20mm centres. Single Deflection Supply Air Registers shall be finished in powder coat and fitted with accessories and dampers where indicated as manufactured by Holyoake.