Stainless steel ceiling diffusers shall be directional type Model D as manufactured by Anemostat, and shall have a square or rectangular neck. Diffusers shall have a fixed, horizontal air discharge pattern, and shall be configured with a 1,2, 3 or 4 way core / discharge pattern as scheduled. The diffuser core shall be removable, without tools, for cleaning or re-configuring the space air distribution.  No screw holes shall be visible.

Diffusers shall be constructed from 304 or 316 stainless 
steel as scheduled. MRI - all aluminum diffusers shall be 
non-magnetic.

Model SRA square to round duct adapters shall be used in transitioning to round duct. Adapters shall be of sufficient height to include opposed blade volume control dampers, and equalizing deflectors as scheduled. Dampers shall be adjustable from the room side by removing, without tools,  the inner core assembly.

Provide stainless steel opposed blade volume control dampers with the stainless steel diffusers. Non-magnetic aluminum opposed blade volume dampers shall be installed when used for MRI applications.

The manufacturer shall provide performance data obtained in accordance with current ANSI/ASHRAE standard 70.

The baked-on finish shall be Anemostat Arctic White, or color as scheduled. If custom, a sample color chip shall be provided to the diffuser manufacturer. Stainless steel units shall have a satin polish on all exposed surfaces.