Whirlybird Vent

Simply put, you can't buy a better turbine. The turbine design features permanently lubricated upper and lower ball bearings that ensure long life and no maintenance. Other common features of the turbine are its rigid spider-type construction—riveted at every connection and tested to withstand winds of 110 M.P.H.,21 air-foil curved vanes with rolled edges to deflect water, and 100% rust-free all-aluminum construction.