Suggested Division 15 Specifications Square, Rectangular or Round Neck Ceiling Diffusers High Capacity Steel Model: TDX - Fixed Discharge TDX-AA Ceiling diffusers shall be TITUS Models TDX (steel) or TDX-AA (aluminum with miscellaneous steel components) for fixed, horizontal discharge pattern. These diffusers shall consist of an outer frame assembly of the sizes and mounting types shown on the plans and outlet schedule. A square inlet shall be an integral part of the frame assembly and a transition piece shall be available to facilitate attachment of round duct. An inner core assembly consisting of fixed deflection louvers shall be available in one-, two-, three- or four-way horizontal discharge patterns. Steel (TDX), or aluminum (TDX-AA), induction nozzles shall be welded to each wing of the inner core. The induction nozzles shall be oriented at 45° angles in split opposite directions to ensure rapid mixing of primary and room air. The inner core assembly must be removable in the field without tools for easy installation, cleaning or damper adjustment. 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 (aluminum also available). Damper must be operable from the face of the diffuser by removing the spring loaded inner core assembly. The manufacturer shall provide published performance data for the diffuser. The diffuser shall be tested in accordance with ANSI/ASHRAE Standard 70-1991.