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Lomanco Whirlybird Turbine Vents

Lomanco is the home of the one and only Whirlybird® Turbine Ventilator, the All Weather Turbine Vent.

Whirlybird® turbine vents offer all of the essentials for energy savings and are geared toward going green.



  • Forever Guarantee—residential use only.
  • Permanently lubricated upper and lower ball bearings that ensure long life and no maintenance.
  • All-aluminum rust-free construction.
  • Rigid spider-type structure.
  • Riveted at every connection.
  • 21 air-foil curved vanes with rolled vane edges to deflect water.
  • Exclusive vari-pitch base adjusts to 12/12 roof pitch.
  • Tested to withstand winds of 110 m.p.h.
  • Reduces winter ice building up and energy bills.
  • Big Whirly—14” moves up to 37% more air than the 12”.

Lomanco® Whirlybird®

All Lomanco® Whirlybird® turbines come with a Lifetime Transferable Warranty. 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.

Easy Installation

The Whirlybird® turbine’s large flashing makes installation easy. The Whirlybird® turbine’s exclusive vari-pitch base adjusts to a 12/12 roof pitch for use on many roof applications. When installed properly, the Whirlybird® turbine reduces energy bills and the likelihood of winter ice buildup.

Lomanco® Whirlybird® Bearings

Only the finest quality American-made bearings are used in the Lomanco® Whirlybird® turbine ventilator. Other turbines may skimp on bearing quality, but at Lomanco, we know that bearings are the heart of the turbine. If they’re out of round, poorly sealed or made with inferior materials, they simply won’t last or run as quietly as the Whirlybird turbine.
Compare and you’ll see the difference. You’ll see why Lomanco lasts forever. Guaranteed.

Bearing Main Features

Molded and fully machined raceways for low drag and quiet operation.

DuPont Delrin® inner and outer bearing rings – the longest lasting and smoothest polymer ball bearing material available.

100 Grade 302 series stainless steel balls for low turning resistance and high resistance to moisture.


The Best Guarantee in the Business

The Lomanco Whirlybird turbine and Big Whirly® turbine are guaranteed forever.

If a Lomanco turbine ventilator fails for structural or mechanical reasons, Lomanco will replace it.

This warranty is transferable from the original owner to subsequent owners.