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Dampers | Fire Dampers

Fire Dampers are UL-listed products, installed where the ductwork penetrates the fire partitions in a building, that are designed to close in response to heat and prevent the air distribution system from propagating a fire.  They are considered an essential component of any commercial system. Fire dampers are rated for 3/4 of the overall partition rating: for a 2-hour fire partition, a 1.5-hour fire damper is used; for a 4-hour partition, a 3-hour fire damper is used.  Static fire dampers are used when the HVAC system is designed to be shut down in the event of a fire, while dynamic fire dampers are effective for systems that may still be running.  

Safe-Air Dowco, as our name implies, has a long history of fabricating life-safety solutions for the commercial HVAC market.  Below you will find a table of our curtain-type and bladed fire dampers and a summary of their most important characteristics.  Please click on the orange triangle at the right of the page for more information about each model including the individual product submittal.

Model Rating 1½HR or 3HR Dynamic Static Mounting Min Size W x H Max Single Section W xH
150A
Rating: 1-1/2
Dynamic/Static: Static
Mounting: H/V
Min Size: 4" x 4"
Max Single Section: 60" x 60"-V 48" x 48"-H
Details
150B
Rating: 1-1/2
Dynamic/Static: Static
Mounting: H/V
Min Size: 4" x 4"
Max Single Section: 60" x 55"-V 48" x 43"-H
Details
150C-OV/RD
Oval or Round - Curtain Fire Damper - Fully Caulked(HP)
Rating: 1-1/2
Dynamic/Static: Static
Mounting: H/V
Min Size: 4" x 4"
Max Single Section: 58" x 54"-V 46" x 42"-H
Details
150C-RC
Rectangular - Curtain Fire Damper - Fully Caulked (HP)
Rating: 1-1/2
Dynamic/Static: Static
Mounting: H/V
Min Size: 4" x 4"
Max Single Section: 58" x 54"-V 46" x 42"-H
Details
150D-OV/RD
Oval or Round - Curtain Fire Damper - Tack Welded(LP)
Rating: 1-1/2
Dynamic/Static: Static
Mounting: H/V
Min Size: 4" x 4"
Max Single Section: 58" x 54"-V 46" x 42"-H
Details
150D-RC
Rectangular - Pyro/Gard Fire Damper - Tack Welded(LP)
Rating: 1-1/2
Dynamic/Static: Static
Mounting: H/V
Min Size: 4" x 4"
Max Single Section: 58" x 54"-V 46" x 42"-H
Details
151A
Rating: 1-1/2
Dynamic/Static: Static
Mounting: H/V
Min Size: 4" x 4"
Max Single Section: 60" x 60"-V 48" x 48"-H
Details
152A
Rating: 1-1/2
Dynamic/Static: Static
Mounting: V
Min Size: 4" x 4"
Max Single Section: 30" x 30"
Details
155-A
Rating: 1-1/2
Dynamic/Static: Dynamic
Mounting: H/V
Min Size: 4" x 4"
Max Single Section: 24" x 24"
Details
300A
Rating: 3
Dynamic/Static: Static
Mounting: H/V
Min Size: 4" x 4"
Max Single Section: 24" x 24"-V 48" x 48"-H
Details
300B
Rating: 3
Dynamic/Static: Static
Mounting: H/V
Min Size: 4" x 4"
Max Single Section: 24" x 21"-V 48" x 43"-H
Details
300C-OV/RD
Rating: 3
Dynamic/Static: Static
Mounting: H/V
Min Size: 4" x 4"
Max Single Section: 22" x 20"-V 46" x 42"-H
Details
300C-RC
Rating: 3
Dynamic/Static: Static
Mounting: H/V
Min Size: 4" x 4"
Max Single Section: 22" x 20"-V 46" x 42"-H
Details
300D-OV/RD
Rating: 3
Dynamic/Static: Static
Mounting: H/V
Min Size: 4" x 4"
Max Single Section: 22" x 20"-V 46" x 42"-H
Details
300D-RC
Rating: 3
Dynamic/Static: Static
Mounting: H/V
Min Size: 4" x 4"
Max Single Section: 22" x 20"-V 46" x 42"-H
Details
D-150A
Rating: 1-1/2
Dynamic/Static: Dynamic
Mounting: V
Min Size: 4" x 4"
Max Single Section: 24" x 24"
Details
D-150B
Rating: 1-1/2
Dynamic/Static: Dynamic
Mounting: V
Min Size: 4" x 4"
Max Single Section: 24" x 24"
Details
D-150C-OV/RD
Rating: 1-1/2
Dynamic/Static: Dynamic
Mounting: V
Min Size: 4" x 4"
Max Single Section: 24" x 24"
Details
D-150C-RC
Rectangle
Rating: 1-1/2
Dynamic/Static: Dynamic
Mounting: V
Min Size: 4" x 4"
Max Single Section: 24" x 24"
Details
D-175 & D-175-3
Bladed Fire Damper
Rating: 1-1/2 & 3
Dynamic/Static: Dynamic/Static
Mounting: H/V
Min Size: 8" x 6"
Max Single Section: 36" x 36"
Details
D-300A
Dynamic
Rating: 3
Dynamic/Static: Dynamic
Mounting: V
Min Size: 4" x 4"
Max Single Section: 24" x 24"
Details
D-300B
Dynamic
Rating: 3
Dynamic/Static: Dynamic
Mounting: V
Min Size: 4" x 4"
Max Single Section: 24" x 21"
Details
D-300C-OV/RD
Dynamic
Rating: 3
Dynamic/Static: Dynamic
Mounting: V
Min Size: 4" x 4"-OV 4"-RD
Max Single Section: 22" x 21"-OV 21"-RD
Details
Curtain Fire Damper Installation Instructions Details
Fire Damper Installation Instructions
- Frame Openings
Details
Generic Mullion
Installation Guide
Details