Fire Damper 14-1/2x14-1/2 Horizontal Mount, Spring Loaded UL Listed

Size 14-1/2"x14-1/2" Type AH damper is for ceiling openings or for use with low velocity rectangular ductwork. When used with rectangular duct, the damper is made smaller than the listed duct size. See the following as the Blades are Spring Loaded and mounted inside the the air stream. Union Made, UL Listed, 1 On Hand 75AH Fire Damper Specs