Suggested Division 15 Specifications Perforated Ceiling Diffusers - Curved Blade 1, 2, 3, or 4-Way Deflectors Steel Model: PCS-NT - Flush Face Perforated ceiling diffusers shall be TITUS Model PCS-NT (steel). Diffusers shall be compatible with 24 x 24-inch modules for regressed narrow tee ceiling systems. Diffusers shall have a perforated face with 3/16-inch diameter holes on ¼-inch staggered centers and no less than 51 percent free area. The backpan shall be heavy gauge steel of the sizes and mounting type shown on the plans and outlet schedule. The diffuser neck shall have at least 1-inch depth for easy duct connection. Individually adjustable curved deflectors shall be mounted in the neck of the diffuser and must allow the discharged air to enter the room in either vertical or one-, two-, three- or four-way horizontal jets. The perforated face must be easily unlatchable from the backpan to facilitate opening of the face for pattern controller adjustment or to access an optional damper. The finish shall be #26 white. The finish shall be an anodic acrylic paint, baked at 315°F for 30 minutes. The pencil hardness must be HB to H. The paint must pass a 100-hour ASTM B117 Corrosive Environments Salt Spray Test without creepage, blistering, or deterioration of film. The paint must pass a 250-hour ASTM D870 Water Immersion Test. The paint must also pass the ASTM D2794 Reverse Impact Cracking Test with a 50-inch pound force applied. Optional damper shall be constructed of heavy gauge steel. Damper must be operable from the face of the diffuser by unlatching the diffuser face. The diffuser must be designed such that complete removal of the face is not required during damper adjustment. The manufacturer shall provide published performance data for the perforated diffuser. The diffuser shall be tested in accordance with ANSI/ASHRAE Standard 70-1991.