| Blade Style: | Aluminum Fixed |
|---|---|
| Blade Gauge: | 12 |
| Blade Spacing: | 4" |
| Depth: | 4" |
| Free Area 48 x 48: | 31% |
| Area Velocity FPM: | 1062 |
Sound-attentuating insulated blades provide a dual function of weather protection and airborne sound reduction. The stepped blade also provides additional weather protection than a simple straight-blade design.