PTL, APTL Series Suggested Specification:
Perforated return panel for return applications shall be Tuttle & Bailey model PTL (steel) or APTL (aluminum). Perforated face with 3/16” diameter holes on 1/4” staggered centers and no less than 51% free area. The return panels must match Tuttle & Bailey supply models per plan and outlet schedule.
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 at isothermal conditions.