Suggested Division 15 Specification Linear Bar Diffusers - Aluminum Fixed Bars Model: CT-541 - 1/2" spacing, 1/4" Bars, 15° Deflection Linear bar diffusers shall be TITUS model CT-541 with ¼-inch thick fixed bars at 15° deflection, spaced ½-inch on center. Linear bar diffusers shall be available in standard one-piece lengths up to 6 feet and shall have the sizes and mounting types shown on the plans and outlet schedule. Diffuser lengths greater than 6 feet shall be furnished in multiple sections and will be joined together end-to-end with alignment strips or pins to form a continuous appearance. All alignment components to be provided by the manufacturer. The diffuser core shall have extruded aluminum bars locked into a heavy extruded aluminum border. The deflection bars must be fixed and parallel to the long dimension. The core must have support bars located no more than 9 inches apart and shall be parallel to the short dimension. Floor models of the diffuser shall have heavy duty mounting frames (frames 5, 6 or 15) and removable cores for easy access. The core support bars shall be located no more than 6 inches apart and shall be parallel to the short dimension for added strength. 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. Heavy gauge extruded aluminum end borders and mitered corners shall be available to close off the ends of the diffusers. Optional opposed blade damper shall be constructed of heavy gauge steel (aluminum also available). Damper must be operable from the face of the diffuser. Optional directional blades and blank-offs shall also be available. Optional diffuser curving to a 6-foot minimum radius on most models shall be available as required. The manufacturer shall provide published performance data for the linear bar diffuser. The diffuser shall be tested in accordance with ANSI/ASHRAE Standard 70-1991.