Suggested Division 15 Specification Round Ceiling Diffusers Vertical-to-Horizontal Adjustable Discharge Pattern Model: TMRA-AA - Aluminum Round ceiling diffusers shall be TITUS model TMRA-AA (aluminum with steel screws, adjustable). The TMRA-AA model shall have four cones and round neck inlets of the sizes and mounting types shown on the plans and outlet schedule. Round diffusers shall be constructed of 0.051 aluminum. The airflow discharge pattern shall be field adjustable from horizontal to vertical by extending or retracting the inner three cones. These three cones shall be constructed as a single inner assembly and must be easily removable using a spring lock mechanism. Vertical to horizontal discharge pattern must be achieved by one of three adjustment methods as follows: Type 1. The inner cone assembly can be removed and repositioned by means of adjusting screws. Type 2. The inner cone assembly can be adjusted by sliding the cones up or down. Type 3. The center cone can be rotated clockwise or counterclockwise to move the cones up or down. Optional round damper shall be constructed of heavy gauge steel. Damper must be operable from the face of the diffuser. A retainer cable shall be provided to allow the inner core assembly to hang during maintenance of diffusers with a neck size of 12 inches or greater. 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. The manufacturer shall provide published performance data for the round diffuser. The diffuser shall be tested in accordance with ANSI/ASHRAE Standard 70-1991.