4 1/4" Vertical Mount Fire Damper 2633-36X26 Residential Registers & Grilles 904 - Double Deflection Adjustable

904 - Double Deflection Adjustable Aluminum Blade Grille For a 18" x 4" Duct Opening (front blades parallel to shortest dimension)

904 - Double Deflection Adjustable Aluminum Blade Grille For a 48" x 20" Duct Opening (front blades parallel to shortest dimension)

Standard Features *Surface mount diffuser * Nylon bushings for easy adjustment and quiet setting of steel blades * Countersunk mounting holes for flush appearance with color matching Phillips posi-drive screws * Single deflection diffuser with adjustable steel blades * Steel blades are parallel to longest dimension * Allows 2-way air deflection on one plane * Soft White Options * 931 O - with recessed screwdriver operated opposed blade damper * 1331 and 1332 Series - stainless steel single deflection * Tamper proof screws * Standard Color or Design Color Finish available on this product

Blades are parallel to the longest dimension

Insect Screen

4 1/4" Vertical Mount Fire Damper 2633-36X26 Residential Registers & Grilles 904 - Double Deflection Adjustableh3. 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