Division .28 F1F2

Fire damper means, for the purpose of implementing Regulation II-2/B/9a, a device installed in a ventilation duct which under normal conditions remains open allowing flow in the duct and is closed during a fire, preventing the flow in the duct to restrict the passage of fire. In using the above definition, the following terms may be associated:

1. .1

   automatic fire damper means a fire damper that closes independently in response to exposure to fire products;

2. .2

   manual fire damper means a fire damper that is intended to be opened or closed by the crew by hand at the damper itself; and

3. .3

   remotely operated fire damper means a fire damper that is closed by the crew through a control located at a distance away from the controlled damper.