| Base Size - Roof Ventilators | 30 in x 30 in |
| Blade Dia. | 20 in |
| CFM/Throat Velocity @ 0.050-In. SP Gravity Intake | 1226/545 |
| CFM/Throat Velocity @ 0.050-In. SP Gravity Relief | 1435/638 |
| CFM/Throat Velocity @ 0.100-In. SP Gravity Intake | 1733/770 |
| CFM/Throat Velocity @ 0.100-In. SP Gravity Relief | 2029/902 |
| CFM/Throat Velocity @ 0.125-In. SP Gravity Intake | 1938/861 |
| CFM/Throat Velocity @ 0.125-In. SP Gravity Relief | 2269/1008 |
| CFM/Throat Velocity @ 0.200-In. SP Gravity Intake | 2452/1090 |
| CFM/Throat Velocity @ 0.200-In. SP Gravity Relief | 2870/1276 |
| CFM/Throat Velocity @ 0.250-In. SP Gravity Intake | 2741/1218 |
| CFM/Throat Velocity @ 0.250-In. SP Gravity Relief | 3209/1426 |
| Construction Material | Spun Aluminum |
| Depth (In.), Dimension B, Width (In.) | 35 1/2 in |
| Dimension A | 30 in |
| Dimension C | 11 1/4 in |
| Dimension D | 3 3/4 in |
| Item, Item - Roof Ventilators | Gravity Ventilator |
| Max. Intake CFM/Throat Velocity | 2658/1188 |
| Overall Height (In.) | 13 in |
| Recommended 12 In. Fixed Curb Item No. | 2RB79 |
| Recommended 8 In. Fixed Curb Item No. | 4HX41 |
| Style - Roof Ventilators | Low Profile |