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Fits 1x1 ceiling grids (collar size 6"-10")
Designed for use in walls
Standard Features * Universal Collars for T-bar supply and returns * Soft White Finish * Available for 6" to 14" round duct in 1" increments
CB30 - three way
For evaporative cooling or high-velocity exhaust applications
Pressure Relief HD 3530-12X12 Smoke-Fire Damper Fits 1x1 ceiling grids (collarh3. Standard Features * 3510 Vertical mount * 3520 Horizontal mount air up * 3530 Horizontal mount air down * Designed to open with negative or positive pressures for intake or exhaust air * Felt edge blades to hold noise to a minimum * Aluminum construction * Blade to blade linkage * 1 4" pivot pins in nylon busings * Maximum size 24 x 24 * Mill finish h3. Options * Sleeve variations * Mounting flange * Adjustable counter balance to adjust various
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