4 1/4" Vertical Mount Fire Damper 2633-48X24 past 12 months 2-way register with stiffened 1/2"

2-way register with stiffened 1/2" fan-shaped louvers for silent operation

Hinged perforated face with screwdriver access to release

Designed for ceiling or sidewall applications

904 - Double Deflection Adjustable Aluminum Blade Grille For a 24" x 8" Duct Opening   (front blades parallel to shortest dimension)

Standard Features * 2561 - Square or rectangular fire door for vertical mount only

4 1/4" Vertical Mount Fire Damper 2633-48X24 past 12 months 2-way register with stiffened 1/2"h3. 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