Specifications – Series SD

Single Deflection Spiral Duct Grilles
Model - SD41

Air Outlets shall be model SD41 manufactured by GREENHECK. Units shall be direct spiral duct-mounted single deflection grilles of aluminum (AL) or Galvanized Steel (S) construction with universal frame (U) or curved frame (C). Unit shall have a single set of vertical deflection blades. The units shall be the size and quantity as outlined in the plans and specifications.

Air Outlets shall conform to the duct radius and include a foam gasket around sides and end caps of the unit. Aerodynamically shaped deflector blades shall be on 2/3" centers. Deflector blades shall be individually adjustable. Blades shall pivot in polymer friction mounting retainers. Retainers shall hold the deflector blade position throughout the specified operating range of the device. Metal friction wires are not acceptable.

Units shall be provided with counter sunk screw holes on the face for surface mounting.

Units shall include an air extractor (air scoop) mounted on the back of the grille. Extractor shall be face operated using an extractor adjustment rod.

Double Deflection Spiral Duct Grilles
Model - SD42

Air Outlets shall be model SD42 manufactured by GREENHECK. Units shall be direct spiral duct-mounted double deflection grilles of aluminum (AL) or Galvanized Steel (S) construction with universal frame (U) or curved frame (C). Units shall have vertical front deflector blades and horizontal rear deflection blades. The units shall be the size and quantity as outlined in the plans and specifications.

Air Outlets shall conform to the duct radius and include a foam gasket around sides and end caps of the unit. Aerodynamically shaped deflector blades shall be on 2/3" centers. Deflector blades shall be individually adjustable. Blades shall pivot in polymer friction mounting retainers. Retainers shall hold the deflector blade position throughout the specified operating range of the device. Metal friction wires are not acceptable.

Units shall be provided with counter sunk screw holes on the face for surface mounting.

Units shall include an air extractor (air scoop) mounted on the back of the grille. Extractor shall be face operated using an extractor adjustment rod.

Damper Accessories (Optional)
Optional opposed blade damper shall be constructed of aluminum (model DA) or extruded aluminum (model OBDE), damper must be operable from the face of the diffuser.

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.