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904 - Double Deflection Adjustable Aluminum Blade Grille For a 42" x 18" Duct Opening (front blades parallel to shortest dimension)
Adjustable blades oriented for 3 or 4-way air flow pattern
Options * Sleeve variations * Fractional and odd sizes available h3
Countersunk mounting holes for flush appearance with stainless sheet metal screws
4 1/4" Vertical Mount Fire Damper 2633-24X10 Commercial 904 - Double Deflection Adjustableh3. Standard Features * 2633 Square or rectangular out of airstream fire damper for vertical mount only. * 2634 Square or rectangular Spring actuated (6) out of airstream fire damper for horizontal or vertical mount. * UL and California State Fire Marshall approved * 4 1 4" standard frame style * Maximum dimension 60w, 52h * Interlocking steel roll formed blade (3) with roll formed frames (1) * Blade lock (5) * Damper manufactured from corrosion
