![3 Hour Out Of Air Fire Door Grille 2563-30X30](http://www.registers-direct.com/cdn/shop/products/eb1e033b4fbaeab35b92d589ad563a12_219e8616-4ff2-4400-9c59-68dfc8ac47bf_{width}x.jpg?v=1537517239)
3 Hour Out Of Air Fire Door Grille 2563-30X30
h3.Standard Features * 2561 - Square or rectangular fire door for vertical mount only. Maximum dimension 48w, 49h. For damper free area chart A click here * 2563 - Out-of-Airstream fire door. Square or rectangular for vertical mount only. Maximum dimension 48w, 41h. For damper free area chart B click here * 2565 - Round fire door for vertical mount only. Available 4" thru 40" round. * 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