OFSD-311 : Out of Wall Combination Fire Smoke Damper
OFSD-311 : Out of Wall Combination Fire Smoke Damper
The OFSD-311 is an out-of-wall combination fire/smoke damper featuring airfoil blade construction for improved aerodynamic performance and reduced pressure drop. Approved for installation in walls, partitions, and floors with fire-resistance ratings of less than three hours, it delivers dependable, code-compliant life safety protection. Its grille-access design provides direct access to the damper, closure device, and actuator, streamlining inspection, testing, and maintenance while supporting long-term system reliability.
Product Highlights
| Application |
Out-of-Wall
|
|---|---|
| Blade Type |
Airfoil
|
| Fire Resistance Rating |
1-1/2 Hour
|
| Leakage Class |
I
|
| Maximum Pressure Rating (in. wg.) |
8
|
| Maximum Velocity (fpm) |
4,000
|
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