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12" and 14") * HVD OR - factory installed opposed radial damper (sizes 6"-14") * HVD FR - U
Standard Features * 2533 - Square or rectangular for vertical mount only
Square Collar
cross bars
* UL and California State Fire Marshall approved * 2" thinline frame * Interlocking steel roll-formed blade (3) with roll-formed frames (1) * Blade lock (5) * Damper manufactured from corrosion tested galvanized mild steel (G-90) * Self locking corner (4) * 165° replaceable fusible link (2) h3
2" 3 Hour Vertical Mount Fire Door 2561-18X18 Residential Registers & Grilles 12" and 14") * HVDh3. Standard Features * 2561 Square or rectangular fire door for vertical mount only. Maximum dimension 48w, 49h. For damper free area chart A click here * 2563 Out of Airstream fire door. Square or rectangular for vertical mount only. Maximum dimension 48w, 41h. For damper free area chart B click here * 2565 Round fire door for vertical mount only. Available 4" thru 40" round. * UL and California State Fire Marshall approved * 2" thinline frame *
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