Steel double deflection supply grille, 3/4" blade spacing, front blades parallel to short dimension FEATURES AND BENEFITS Available with front louvers vertical or horizontal Optional opposed blade damper has screwdriver adjustment accessible through face of register Front and rear louvers are individually adjustable Insect and debris screens are not available when dampers are fitted Material is steel #8 x 11/4” lg. Phillip’s flat head sheet metal screws (painted) All dimensions are ± 1/16”

For natural gravity or positive pressure systems, model GRS offers excellent performance and durability for intake or relief applications. Featuring an exceptional low silhouette design and rugged construction this model is both efficient and economical.

• 34 x 34 inch base with prepunched mounting holes for easy attachment to roof curb
• All aluminum exterior for corrosion-resistant construction
• Integral birdscreen to prevent entry of birds and small objects

The CRD-1 is a UL555C classified damper designed to limit the radiant heat transfer through an opening in the ceiling membrane of a fire-resistance rated floor/ceiling assembly of three hours or less