PM, APM Series Suggested Specification:
Perforated ceiling supply diffuser shall be Tuttle & Bailey model PM (steel construction) or APM (aluminum construction). Diffusers shall have perforated face with 3/16” diameter holes on 1/4” staggered centers and no less than 51% free area. The backpan shall be steel or aluminum construction with margin styles and sizes shown per plans. The diffuser core shall consist of four louver directional modules that can be removed or repositioned to configure a 4, 3, 2 or 1-way discharge pattern, and provide access to duct.
Finish shall be Tuttle & Bailey white (WH) electrocoat finish. The finish shall be an anodic acrylic paint, baked at 315ºF for 30 minutes with a pencil hardness of HB to H.
The manufacturer shall provide published performance data tested in accordance with ANSI/ASHRAE Standard 70-1991.