Specifications – Series HDRG41

Heavy Duty Fixed Blade Return Grille 
HDRG41-1 Surface Mount

Air Inlets shall be model HDRG41 manufactured by GREENHECK. Units shall be return, or exhaust grilles constructed aluminum (AL) or steel (S), material shall be equivalent to 14-gauge deflector blades and 16-gauge borders. Units shall have aerodynamically shaped deflector blades at 0° deflection on 3/8” centers or 38° deflection on ½” centers. Border shall be 1 1/4" wide. Inlets shall be designed to withstand moderate physical abuse. 

The units shall be the size and quantity as outlined in the plans and specifications.

For Surface mounting:
Units shall be designed for surface mounting applications and be provided with counter sunk screw holes on the face of the device.

Damper Accessories (Optional)
Optional opposed blade damper shall be constructed of steel (Model OBD), aluminum (Model OBDA), 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.