Non-adjustable, one slot, one way plenum-slot supply diffusers shall be Anemostat Model FD and Model FSR combination supply-return assemblies as scheduled.  Outer frame type shall conform and integrate with the ceiling grid system shown.

The diffuser deflecting vane shall be curved, and shall run the entire length of the plenum-slot diffuser assembly, providing a horizontal air pattern along the ceiling surface in which it is located. The deflecting vane shall be factory attached, and fixed.  No pattern adjustment shall be required.

Combination supply and return air assemblies shall include a fixed, supply air slot for horizontal discharge of air, and an air passageway to the ceiling plenum for return air.

Diffusers shall be constructed from minimum 24 gauge zinc coated steel.  The exposed face surfaces and deflection vane shall be painted flat black.

Model FD/FSR Optional Accessories
Provide field mounted inlet balancing dampers as scheduled. Plenums shall be insulated with (1/2" internal insulation) (1/2" external foil-faced insulation) (1/2" internal foil-faced insulation). Side tees shall be included where shown and shall be finished with Anemostat Arctic White.  Provide surface mounting frames for installation into hard surfaced ceilings as required.  T-bar clips will be provided to stabilize the diffuser within grid systems.