4 1/4" Vertical Mount Fire Damper 2633-36X28 Smoke-Fire Damper Air Patterns

Air Patterns

Options * Sleeve variations * 304 stainless steel construction * Fractional and odd sizes available h3

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

Standard Features * Extruded aluminum construction with steel multi-shutter damper * Margin edges are 7/8" projection for baseboard installation * Nylon bushings for easy adjustment and quiet setting of airfoil blades running parallel to shortest dimension * Countersunk mounting holes for flush appearance

Note: Listed Size Is Nominal Duct Opening / Nominal Filter Size

4 1/4" Vertical Mount Fire Damper 2633-36X28 Smoke-Fire Damper Air Patternsh3. 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