4 1/4" Vertical Mount Fire Damper 2633-48X20 past 12 months Standard Features * 2533 -

Standard Features * 2533 - Square or rectangular for vertical mount only

Designed for high volume air delivery

Countersunk mounting holes for flush appearance with color matching Phillips Pozidriv screws

Blades are parallel to the longest dimension

1/4” crossbars

4 1/4" Vertical Mount Fire Damper 2633-48X20 past 12 months Standard Features * 2533 -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