4 1/4" Vertical Mount Fire Damper 2633-40X6 Smoke-Fire Damper 11/32” Wide x 1-27/32” High

11/32” Wide x 1-27/32” High slots

Double deflection surface mount grille with adjustable airfoil blades

700 CB30 - three way

Standard Features *Surface mount return air grille * 0 fixed blades parallel to longest dimension * Countersunk mounting holes for flush appearance with color matching Phillips posi-drive screws * Soft White Options * 937 O - recessed screwdriver operated opposed blade damper * No Labor Collar (square sizes only) * 900 T - T-Bar mount * 905 HD - reinforced construction * 905 IS - insect screen * 1335-1338 Series - stainless steel version * Tamper proof screws

2750 Series Submittal

4 1/4" Vertical Mount Fire Damper 2633-40X6 Smoke-Fire Damper 11/32” Wide x 1-27/32” Highh3. 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