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Ships within 48 hours · Estimated delivery Aug 15 - Aug 20
For evaporative coolers or central blower systems
Standard Features
4-Way ceiling register with stiffened 1/2" fan shaped louvers for silent operation
BD - field installable Bowtie Damper (available on even sizes 6"-14")
4" 3 Hour Vertical Mount Fire Door 2661-24X18 Step Down Ceiling Diffuser For evaporative coolers or centralh3. 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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