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Ships within 48 hours · Estimated delivery Sep 9 - Sep 14
Standard Features * Fixed bar blades parallel to 1st dimension given *
1/2" spacing dual angular louvers for strength and maximum free area
855 Series Engineering/Performance Data
inner dimension and outside dimension available * Available in continuous lengths with butt joints * Tamper proof screws * Standard Color
904 - Double Deflection Adjustable Aluminum Blade Grille For a 24" x 20" Duct Opening (front blades parallel to shortest dimension)
2" Round Vertical Mount Fire Damper 2549-18 Step Down Ceiling Diffuser Standard Features * Fixed barh3. Standard Features * 1 1 2 hour rated fire damper * 2549 Round damper for vertical mount only. Available 4" thru 40" round. * 2550 Round Spring actuated (6) damper for vertical or horizontal mount. Available 4" thru 28" round. * UL and California State Fire Marshall approved * 2" thinline frame * Interlocking steel roll formed blade (3) with roll formed frames (1) * Blade lock (5) * Damper manufactured from corrosion tested galvanized mild steel (G
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