4" Horizontal/Vertical Mount Fire Damper 2634-48X12 Smoke-Fire Damper 1/2" spacing dual angular louvers

1/2" spacing dual angular louvers for strength and maximum free area

Standard Features * 45-degree fixed blades parallel to the longest dimension * Hand operated lever for easy filter access * Holds up to 2" thick standard filter (not included) * Removable face for easy cleaning and maintenance * Filter door hinges parallel to longest side * 4-way reversible door on square sizes * 2-way reversible door on rectangular sizes * Filter retention tabs * Concealed mounting holes * Soft White Options * SP920FG-4 - holds 4" deep air filter * 920 TFG - T-Bar mount * Standard Color or Designer Color Finish available on this product

RD Series Engineering/Performance Data

3 hour fire resistance rating

Standard Features * Individually adjustable curved blade T-Bar lay in diffuser with concealed hinges * Hinged perforated face * Spring push release for easy access to adjust curved blades * 2x2 galvaneal steel panel with seismic support hangers * Round No Labor Collar sizes: 6-10"

4" Horizontal/Vertical Mount Fire Damper 2634-48X12 Smoke-Fire Damper 1/2" spacing dual angular louversh3. 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