2" Vertical Mount Fire Damper 2501-12X12

h3.Standard Features * 2501 -Square or rectangular for vertical mount only. Maximum dimension 48w, 49h. * 2502 - Square or rectangular spring actuated (6) for horizontal or vertical mount. Maximum dimension 41w, 36h. * UL and California State Fire Marshall approved * 2" thinline frame * Interlocking steel roll-formed blade (3) with roll-formed frames (1) * Blade lock (5) * Damper manufactured from corrosion tested galvanized mild steel (G-90) * Self locking corner (4) * 165° replaceable fusible link (2) h3.Options * Sleeve variations * Fractional and odd sizes available h3.Installation Instructions * UL approved installation instructions