3 Hour Out Of Air Fire Door Grille 2663-20X14 Residential Registers & Grilles 3 hour fire resistance rating

3 hour fire resistance rating

12" and 14") * HVD OR - factory installed opposed radial damper (sizes 6"-14") * HVD FR - U

Standard Features * Stamped steel curved blade T-Bar lay-in diffuser with perforated face * Five air patterns: 101 P - one way

Square or rectangular for vertical mount only

2500/2600 Installation Instructions

3 Hour Out Of Air Fire Door Grille 2663-20X14 Residential Registers & Grilles 3 hour fire resistance ratingh3. Standard Features * 2661 Square or rectangular fire door for vertical mount only. Maximum dimension 60x60. For damper free area chart A click here * 2663 Out of Airstream fire door. Square or rectangular for vertical mount only. Maximum dimension 60w x 52h. For damper free area chart B click here * 2665 Round fire door for vertical mount only. Available 4" thru 52" round. * 3 hour rated * UL and California State Fire Marshall approved * 4 1 4"