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blades prevent metal on metal rattle
Designed for protection of ceiling openings in fire rated floor/ceiling assemblies with fire resistance ratings of 3 hours or less
Standard Features * 2x2 panel with fixed 22 gauge steel perforated face * 7/8" fiberglass back (R4 value) * Pattern controllers can be adjusted to 1
SUBMITTALS
Standard Features * Gang-operated opposed blade radial volume control damper for use with RD Series Round Diffusers * Available in 2" increments from 6"-24"
Aluminum Airfoil Blade Grille - Vertical Fixed Blade 908-12X40 Finish:Designer Color - Velvet Black blades prevent metal on metalStandard Features * Extruded . 055 T6 aluminum surface mount return air grille * 0 fixed blades parallel to shortest dimension * Countersunk mounting holes for flush appearance with color matching Phillips posi drive screws * Soft White Options * 908 O recessed screwdriver operated opposed blade damper * No Labor Collar (square sizes only) * 900 T T Bar mount * 905 HD reinforced construction * 905 IS insect screen * 1335 1338 Series stainless steel
