Nominal 24” x 24” ceiling diffusers shall be Model QLT (Inverted T-bar)/ QLD (9/16” narrow slot) ceiling tile diffusers as manufactured by Anemostat. Diffusers shall consist of extruded aluminum inner tees and an outer frame that integrates with the ceiling type shown, and shall be designed to accept a ceiling tile as specified for the suspended ceiling system in which the diffuser is installed.  The tile shall be provided, cut, and placed into the diffuser by the installing contractor.  Diffusers shall consist of 1, 2, 3, or 4 perimeter slots, 3/4” or 1” wide as scheduled.  Each slot shall include black internal pattern/volume controllers that allow adjustment of both air flow direction and volume.  A removable steel, round flexible duct adapter shall be provide as shown on the plans.
Accessories shall include: 1/2” internal insulation, Model LS Light Shield for non-ducted ceiling returns, Model VD butterfly volume control damper, Model TBF T-bar frame, where scheduled.

The extruded aluminum frame and inner tees shall have a baked-on white finish with black pattern/volume controllers.  The optional square to round flex duct adapter shall be painted black in the interior.  If custom, a sample color chip shall be provided to the diffuser manufacturer.