4 1/4" Vertical Mount Fire Damper 2633-14X8 past 12 months Opposed Blade Damper standard on

Opposed Blade Damper standard on 4" widths

listed Fire-Resistance Diffusers * TVB - Thermal Vapor Blanket * Square collar

Spiral pipe diameter must be 4” larger than the width of the grille

032 Aluminum construction * Tamper proof screws * Standard Color

4 1/4" Vertical Mount Fire Damper 2633-14X8 past 12 months Opposed Blade Damper standard onh3. 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