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Ships within 48 hours · Estimated delivery Sep 22 - Sep 27
Blades are parallel to the longest dimension
Extruded aluminum fixed bar blades at 45°
Building materials rated 3 hours or less
Round Bowtie Damper
4" 3 Hour Vertical Mount Fire Door 2665-28 Accessories Blades are parallel to theh3. 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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