Lomanco Turbine Ventilators are available in three sizes - 8, 12 and 14 in. The 14 in Big Whirlybird Turbine moves 37% more air than the 12 in Whirlybird Turbine. The 12 in Whirlybird Turbine is available in aluminum and galvanized finishes, as well as a tile roof design. Whirlybird turbines are also available in two models - internally or externally braced. While both internally and externally braced turbines have the same internal construction, our externally braced turbines have three braces surrounding the outside of the turbine.
| Air Flow Rate | : | 110 mph |
| Base Size | : | 20 x 20 in |
| Bearing Type | : | Ball |
| Bracing Type | : | Internal |
| Color | : | Silver |
| Finish | : | Galvanized |
| Material | : | Steel |
| Net Free Ventilating Area | : | 259 sq-in |
| Overall Height | : | 15-3/4 in |
| Overall Length | : | 20 in |
| Overall Width | : | 20 in |
| Roof Pitch | : | 7/12 |
| Suitable for | : | Roof Pitches Up to 7/12 |
| Throat Diameter | : | 12 in |