 |
Difference between Fire dampers & Ceiling Radiation
dampers
|
What is a fire damper?
-
A device used in a fire-rated barrier, floor or wall.
- In conjunction with
the air distribution system.
- Trigger mechanism is a heat fusible
link.
- Impedes migration of high temperatures into and through the duct
system.
1½ - hour rated damper is for use in barriers rated
for two hours.
3 - hour rated damper is for use in barriers rated for four
hours.
|
UNDERWRITERS LABORATORIES (UL555)
CLASSIFIED FIRE DAMPERS. FIRE RESISTANCE RATED 1½ HOUR. FOR USE IN UL
CLASSIFIED BUILDING MATERIALS RATED 2 HOURS OR LESS. |
|
UNDERWRITERS LABORATORIES (UL555)
CLASSIFIED FIRE DAMPERS. FIRE RESISTANCE RATED 3 HOURS. FOR USE IN UL
CLASSIFIED BUILDING MATERIALS RATED 4 HOURS OR LESS. |
|
|
 |
|
What is a ceiling radiation
damper?
- Same use as a fire damper, but used in a fire-rated
ceiling to impede migration of high temperatures into and through the duct
system.
- A device installed in the throat of a ceiling diffuser or return
air grille.
- Required where a suspended ceiling is part of a fire rating
for the floor or roof above the suspended ceiling.
|
UNDERWRITERS LABORATORIES (UL 555C)
CLASSIFIED CEILING RADIATION DAMPERS. FIRE RESISTANCE RATED 3 HOURS FOR USE IN
UL CLASSIFIED BUILDING MATERIALS RATED 3 HOURS OR LESS. |
|
APPLIED RESEARCH LABORATORIES (UL555C)
CLASSI-FIED CEILING RADIATION DAMPERS. FIRE RESISTANCE RATED 3 HOURS. FOR USE
IN UL CLASSIFIED BUILDING MATERIALS RATED 3 HOURS OR LESS. |
|
|
 |
Where are fire/ceiling dampers used?
- In air
distribution systems whenever the ductwork penetrates a fire-rated
barrier.
- Typically used in commercial and institutional
buildings:
   |
|
