Models HD15 / HD25 - Supply
Heavy duty steel single and double deflection supply grilles & registers shall be Anemostat Model HD15 ((Steel)(Aluminum)(304SS), Single deflection) or Model HD25 ((Steel)(Aluminum)(304SS), Double deflection) as scheduled.  Provide sizes and mounting types as scheduled.  The grilles shall consist of a minimum 16 gauge steel outer border or frame, with face directional blades horizontal or vertical as detailed. Frame mounting holes shall be countersunk for oval head screws, provided by the grille manufacturer. Individually adjustable blades shall be spaced 9/16" centers maximum and shall provide directional and spread control of the air stream. ¾” deep steel front blades shall penetrate through minimum 14 gauge steel support mullions, spaced 6" centers maximum. Support mullions shall be arc welded at the frame to provide a heavy, impact resistant assembly.  Double deflection units shall include a secondary set of blades on 3/4" centers, perpendicular to the face blades.  Blades shall have ample friction to prevent rotation due to impacts.  

Where scheduled, include steel, aluminum, or stainless steel opposed blade volume control dampers.

Provide a baked-on, arctic white finish, or custom color as selected by the architect. 

Model HD3 - Return
Heavy duty (Steel)(Aluminum)(304SS) exhaust / return grilles & registers shall be Anemostat Model HD3 (3/4" blade spacing) or Model HD35 (1/2" blade spacing) as scheduled.  Provide sizes and mounting types as scheduled.  For surface mounting applications, countersunk mounting holes shall be provided in the border, with oval head screws also provided by the grille manufacturer. The grilles shall consist of a minimum 16 gauge steel outer border or frame with blades running horizontal or vertical (short or long dimension) as shown.  ¾” Deep steel front blades shall penetrate through minimum 14 gauge steel support mullions, spaced 6" centers maximum. Support mullions shall be arc welded at the frame to provide a heavy, impact resistant assembly.  Blades shall be fixed at a 0° or 40° deflection angle. Corners shall be welded or staked for neat, uniform mitered corners.  

Where scheduled, include steel or aluminum opposed blade volume control dampers.

Provide a baked-on, arctic white finish, or custom color as selected by the architect.