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Ships within 48 hours · Estimated delivery Sep 28 - Oct 3
Allows for 4-way airflow
Extended sleeve (2751)
Airfoil blades individually adjustable on 3/4" centers
3-way register with stiffened 1/2" fan shaped louvers for silent operation
4" 3 Hour Vertical Mount Fire Door 2665-48 Step Down Ceiling Diffuser Allows for 4-way airflowh3. 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"
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