Specifications – Series CDR

Round Ceiling Diffuser
CDR-1 – Flush Surface Mount
CDR-2 – Bevel Drop Surface Mount

Air outlets shall be model CDR manufactured by GREENHECK Diffuser shall be constructed aluminum (AL) or steel (S). Units shall have 3 round cones consisting of 2 round inner cones mounted in a round outer cone with optional fourth center cone (4C).

Outlet shall have a fixed horizontal pattern with option for adjustable core (A) for vertical pattern, adjustment shall be accomplished by rotating the innermost cone. The units shall be the size and quantity as outline in the plans and specifications.

The inner core assembly shall be removable for installation and for access into the ductwork. The center cone shall include an access hole to allow adjustment of an optional damper.

Outlet shall have an outer cone that allows flush mounting (-1) to the ceiling opening.

Outlet shall have a bevel drop (-2) outer cone to move the discharge jet away from the ceiling surface. Dropped cone shall minimize ceiling smudging.

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.