Specifications - Series CDP 
Square Face Plaque Diffuser with Round Neck 

CDP-1 - Surface Mount 
CDP-6 - T-bar Lay-in 
CDP-7 - Concealed Spline
CDP-9 - Donn Fineline Lay-in

Air outlets shall be model CDP-S manufactured by GREENHECK and shall be constructed of steel.
Air outlets shall be model CDP-AL manufactured by GREENHECK and shall be constructed of aluminum.

Air outlets shall be provided with round face panel model CDP-RP manufactured by GREENHECK.
Air outlets shall be provided with square face panel with round perforated center model CDP-T manufactured by GREENHECK.

Units shall be square with a formed backpan and a flat face panel. Face panel shall project no more than 1/4" below the ceiling grid or surface. Outlet shall have the same appearance from the face regardless of inlet size. The units shall be the size and quantity as outlined in the plans and specifications.

Inlet collar shall be drawn into the backpan of the diffuser. Welded inlet collars are not acceptable. Diffusers shall include seismic tabs drawn into the backpan. Face panel shall be removable without the aid of tools to access optional damper and if needed for installation. Units requiring tools to remove the face panel are not acceptable.

Units shall be designed to integrate into the specified ceiling system.

Optional Dampers and Accessories

Butterfly Damper
GREENHECK model BDS aluminum, round butterfly type dampers shall be provided. Damper shall consist of two butterfly style blades that can be adjusted from full open to full closed. Damper shall be adjusted with a screwdriver slot that can be assessed through the face of the diffuser.

Radial Shutter Damper
GREENHECK model RSD steel round radial shutter damper shall be provided. Damper shall consist of gang operated radial blades that slide perpendicular to air flow direction. The damper shall be adjusted from full open to full closed. Damper shall be adjusted with a screwdriver slot that can be assessed through the face of the diffuser.

Equalizing Grid
GREENHECK model G3 aluminum, round equalizing grid shall be provided. Equalizing grid shall consist of 1/2" x 1/2" x 1/2" aluminum cubed core mounting in an aluminum frame.

Performance Specification
The manufacturer shall provide published performance data. Data shall be tested in accordance to ANSI/ASHRAE Standard 70- 2006

Paint Specification
Process shall be anodic electrodeposition using an anodic acrylic paint. Units shall undergo pre‐ treatment including a pressurized spray stage using an alkaline cleaner and a de‐ionized water rinse.