The EcoBOSS® Heavy Duty Barometric Damper is designed to automatically bleed in air to avoid fan instability and maintain suitable conveying velocities in duct lines.
Heavy duty galvanized steel construction
Heavy duty adjustable counterweight with safety chain
Removable inspection door
Sizes 6″ through 18″: 90º flared ends for use with optional quick connection clamps and adaptors
Sizes 20″ and larger: Flanged ends with co-flanges