4 1/4" Vertical Mount Fire Damper 2633-18X10 Smoke-Fire Damper Blades are parallel to the

Blades are parallel to the longest dimension

Maximum dimension 60x60

Standard Features * T-Bar lay-in panel with perforated face * 2x2 galvaneal steel panel with seismic support hangers * Round No Labor Collar attached to panel * Soft White Options * 105 P D - multi-shutter damper with hinged perforated face * 105 P O - opposed blade damper with hinged perforated face * TVB - Thermal Vapor Blanket * Square collar

Standard Features * 4000 - door core grille with single frame * 4100 - door core grille with additional loose frame *

Lever operated Multi-Shutter Damper

4 1/4" Vertical Mount Fire Damper 2633-18X10 Smoke-Fire Damper Blades are parallel to theh3. 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