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Ships within 48 hours · Estimated delivery Oct 2 - Oct 7
Spiral pipe diameter must be 4” larger than Height of the duct opening
Square or rectangular for vertical mount only
Hinged removable door with hinges parallel to the longest dimension
Face set in an outer T-Bar filter grille frame
4" Round Horizontal/Vertical Fire Damper 2650-4 Accessories Spiral pipe diameter must beh3. Standard Features * 2649 Round damper for vertical mount only. Available 4" thru 52" round. * 2650 Round spring actuated (6) damper for vertical or horizontal mount. Available 4" thru 52" round. * UL and California State Fire Marshall approved * 4 1 4" standard frame style * 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
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