| Base Size - Roof Ventilators | 19 in x 19 in |
| Blade Dia. | 10 in |
| CFM/Throat Velocity @ 0.050-In. SP Gravity Intake | 312/548 |
| CFM/Throat Velocity @ 0.050-In. SP Gravity Relief | 370/650 |
| CFM/Throat Velocity @ 0.100-In. SP Gravity Intake | 442/775 |
| CFM/Throat Velocity @ 0.100-In. SP Gravity Relief | 524/919 |
| CFM/Throat Velocity @ 0.125-In. SP Gravity Intake | 494/866 |
| CFM/Throat Velocity @ 0.125-In. SP Gravity Relief | 586/1027 |
| CFM/Throat Velocity @ 0.200-In. SP Gravity Intake | 624/1096 |
| CFM/Throat Velocity @ 0.200-In. SP Gravity Relief | 741/1299 |
| CFM/Throat Velocity @ 0.250-In. SP Gravity Intake | 698/1225 |
| CFM/Throat Velocity @ 0.250-In. SP Gravity Relief | 828/1453 |
| Construction Material | Spun Aluminum |
| Depth (In.), Dimension B, Width (In.) | 20 1/2 in |
| Dimension A | 19 in |
| Dimension C | 7 1/4 in |
| Dimension D | 2 in |
| Item, Item - Roof Ventilators | Gravity Ventilator |
| Max. Intake CFM/Throat Velocity | 1032/1801 |
| Overall Height (In.) | 9 in |
| Recommended 12 In. Fixed Curb Item No. | 2RB75 |
| Recommended 8 In. Fixed Curb Item No. | 4HX38 |
| Style - Roof Ventilators | Low Profile |