A fire damper is a curtain or multi-blade damper held open with a fusible link. During a fire event, the link melts and the damper closes. A smoke damper is a multi-blade damper that operates with an ...

The one-and-a-half-hour rated single aerodynamic blade dynamic (with fan on) or static (with fan off) fire damper uses a resettable fuse link. The reset arm helps in testing to meet National Fire ...