4 1/4" Vertical Mount Fire Damper 2633-40X10 Commercial 904 Series Performance Data

904 Series Performance Data

Adjustable aluminum airfoil blades oriented for 1 or 2 way airflow pattern

Standard Features * Return air T-Bar lay-in filter grille for 20" x 20" duct * Removable louvered 20 gauge steel face * 20" x 20" x 1" filter (not included) * Square collar (20x20) * 2x2 panel * Seismic support holes * Soft White Options * Square to round No Labor Collar

2550 Series Engineering/Performance Data

Steel construction

4 1/4" Vertical Mount Fire Damper 2633-40X10 Commercial 904 Series Performance Datah3. 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