4 1/4" Vertical Mount Fire Damper 2633-16X16 past 12 months Standard Features * Adjustable curved

Standard Features * Adjustable curved blade

916 Series Submittal

Standard Features * 2x2 panel with fixed 22 gauge steel perforated face * 7/8" fiberglass back (R4 value) * Pattern controllers can be adjusted to 1

904 - Double Deflection Adjustable Aluminum Blade Grille For a 24" x 16" duct Opening  (front blades parallel to shortest dimension)

Performance Data With Multi-Shutter Damper

4 1/4" Vertical Mount Fire Damper 2633-16X16 past 12 months Standard Features * Adjustable curvedh3. 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