4" Horizontal/Vertical Mount Fire Damper 2634-14X10 Step Down Ceiling Diffuser 2" ADC compliant round collar

2" ADC compliant round collar with a bead for ease of installation

Ceiling opening must be 4” larger in length and width than the nominal duct size

904 - Double Deflection Adjustable Aluminum Blade Grille For a 30" x 18" Duct Opening (front blades parallel to shortest dimension)

Standard Features * 1/2" spacing dual angular louvers * 22 & 20 gauge cold roll steel * Mullions are reinforced with stiffeners for greater strength * For applications where greater air volume is required * Install with louvers in up or down position for best duct concealment * Countersunk mounting holes for flush appearance with color matching Phillips posi-drive screws * Soft White Options * Tamper proof screws * Standard Color

904 - Double Deflection Adjustable Aluminum Blade Grille For a 24" x 16" duct Opening  (front blades parallel to shortest dimension)

4" Horizontal/Vertical Mount Fire Damper 2634-14X10 Step Down Ceiling Diffuser 2" ADC compliant round collarh3. 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