3 Hour Out Of Air Fire Door Grille 2663-16X16 Accessories 3% maximum leakage with a

3% maximum leakage with a pressure differential 3" W

Standard Features * Airflow can be adjusted to 1

SD52 Series Performance Data

Adjustable steel curved blades

450 Series Engineering/Performance Data

3 Hour Out Of Air Fire Door Grille 2663-16X16 Accessories 3% maximum leakage with ah3. 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"