What is a Type A fire damper?

Type-A Fire Damper: Used when the airflow interruption from the stack of blades in the fire damper frame is not a prime concern or consideration. Type-A dampers are the easiest and fastest type to install and are mostly used in low-pressure part of duct systems (up to 2” w.c.).

What is the difference between a fire damper and a smoke damper?

Knowledge of these differences is imperative to the proper application of the dampers and their performance in the life/safety system. A fire damper closes once the duct temperature reaches a high enough level to melt a fusible link. A smoke damper closes upon the detection of smoke.

How does a fire damper work?

The operation of fire dampers is simple: they close when the temperature in the room or space rises over the threshold limit to prevent the fire from spreading. Halton fire dampers have fusible link, which is selected according to desired temperature. Once this temperature is reached, damper closes.

How do I choose a fire damper?

The hour ratings for fire dampers must be 75% of the hour rating for the wall, floor or partition. That is why a fire damper rated for 1.5 hours can be used in a fire barrier rated for up to 2 hours and a fire damper rated for 3 hours can be used in a fire barrier rated up to four hours.

How many types of fire dampers are there?

There are two main types of fire dampers: dynamic fire dampers and static fire dampers. Dynamic fire dampers have been UL tested to close against sys- tem air pressure and velocity.

What activates a fire damper?

In general a fire damper works when heat from a fire causes the normal temperature of a room to rise to approximately 165 degrees Fahrenheit i.e. it is designed to close automatically on the detection of heat. The fusible link which is attached to the damper melts causing the dampers’ door to close.

How do you size a fire damper?

Does a fire damper have to be in the wall?

One should actually think of the fire damper as part of the wall system itself. Sleeves and Attachment: Fire dampers are required to be installed in sleeves. Lighter gauge sleeves (18–20 ga.) require a breakaway connection from the sleeve to the duct- work.