Lomanco BIB-12 Mill Whirlybird Turbine Ventilator

Product Description Designed for superior performance, the 12” turbine ventilator features an internal brace and permanently lubricated upper and lower bearings. Built to last, the unit features a rust-free, no maintenance construction. Innovatively designed, the rigid spider type structure ensures efficient operation, ultimately reducing energy bills. Easy to install, the vari-pitch base can be adjusted to a 12/12 roof pitch. Amazon.com Featuring permanently lubricated upper and lower ball bearings, the Lomanco 12-inch whirlybird turbine ventilator ensures long life and no maintenance. It reduces winter ice build-up, as well as energy bills. Made with all-aluminum, rust-free construction, this internally braced turbine ventilator withstands winds up to 147 MPH. With a rigid, spider-type structure, it's riveted at every connection. The ventilator features 21 air-foil curved vanes with rolled vane edges to deflect water and a vari-pitch base that adjusts to a 12/12 roof pitch. Designed for residential use only, this turbine ventilator comes with a lifetime warranty.