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Ships within 48 hours · Estimated delivery Aug 8 - Aug 13
round collar only) * 830 OR - factory installed opposed radial damper (sizes 6"-14") * 830 FR - U
Square collar designed for 20” × 20” duct
Holds up to 1" filter
One-piece removable slide damper for off-season closure
4" Round Horizontal/Vertical Fire Damper 2650-18 Commercial round collar only) * 830h3. 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
US$ 58.00
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US$ 14.00
