Specifications - Series CDS
Three Cone Square Face Diffuser with Round Neck

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

Non-Adjustable, Horizontal Discharge Pattern
Air outlets shall be model CDS-S manufactured by GREENHECK shall be constructed of steel.
Air outlets shall be model CDS-AL manufactured by GREENHECK shall be constructed of aluminum.

Units shall be square with a formed backpan and two inner cones. 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. Inner cone assembly shall be removable without the aid of tools to access the optional damper and for installation if needed. Units requiring tools such as screwdrivers or hex keys to remove the inner cones are not acceptable.

The bottom cone shall have a removable plug in the center to allow access to adjust an optional damper. Units shall include the option to allow a field installed third optional cone accessory model (4C). Optional third cone shall be installed into the bottom of the CDS diffuser without the use of tools.
Units shall be designed to integrate into the specified ceiling system.

Optional for Adjustable Pattern
Outlet shall include adjustable deflector blades located within the cones of the device. Deflectors shall allow the discharge air to be adjusted to obtain a vertical or horizontal air pattern.

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

Adjustable Discharge Pattern
Air inlets shall be model CDS-A-S manufactured by GREENHECK shall be constructed of steel.
Air inlets shall be model CDS-A-AL manufactured by GREENHECK shall be constructed of aluminum.

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.