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Ships within 48 hours · Estimated delivery Aug 22 - Aug 27
Available in 4" through 29" round
3/4” Wide x 3/4” High square holes
60% free area * Soft White Options * Countersunk screwholes with matching Phillips #8 x 1-1/2" oval Screws * 10 or 12 gauge steel * Tamper proof screws
3 hour fire resistance rating
Parallel Blade Volume Damper 3000P-28X22 past 12 months Available in 4" through 29"h3. Standard Features * 16 gauge galvanized channel frame * Parallel blades are cee stiffened 16 gauge galvanized for strength and stability * Blades pivot on non metallic celcon bushings * 1 2" square zinc plated steel pivot pins * 1 2" square zinc plated steel adjustable operating shaft extending up to 4" beyond the air control frame * Single blades on dampers with a height of 12" or less * Mill finish h3. Options * 3000 PLL Low Leak Air Control
