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904 - Double Deflection Adjustable Aluminum Blade Grille For a 30" x 12" Duct Opening (front blades parallel to shortest dimension)
HVL Series Engineering/Performance Data
*Note: Ceramic fiber blade insulation is not UL required on dampers with free areas less than 80 square inches
904 - Double Deflection Adjustable Aluminum Blade Grille For a 24" x 16" duct Opening (front blades parallel to shortest dimension)
3 hour fire resistance rating
Aluminum Airfoil Blade Grille - Vertical Fixed Blade 906-30X10 Finish:Designer Color - Velvet Black 904 - Double Deflection AdjustableStandard Features * Extruded . 055 T6 aluminum surface mount return air grille * 45 fixed blades parallel to shortest dimension * Countersunk mounting holes for flush appearance with color matching Phillips posi drive screws * Soft White Options * 906 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
