4 1/4" Vertical Mount Fire Damper 2633-44X8 past 12 months Countersunk mounting holes for flush

Countersunk mounting holes for flush appearance with color matching screws

HVL Series Engineering/Performance Data

Square collar designed for a 20” × 20”

904 - Double Deflection Adjustable Aluminum Blade Grille For a 30" x 20" Duct Opening (front blades parallel to shortest dimension)

Ideal for residential and light commercial application

4 1/4" Vertical Mount Fire Damper 2633-44X8 past 12 months Countersunk mounting holes for flushh3. 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