Whirlybird turbines offer all of the essentials for energy savings and are geared towards going green while maximizing ventilation capacity. The Whirlybird's large flashing makes installation easy. An exclusive vari-pitch base adjusts to a 12/12 roof pitch for use on many roof applications. When installed with adequate intake ventilation, the Whirlybird turbine reduces energy bills and the likelihood of winter ice buildup. Extends the life of shingles, insulation and other building components by exhausting damaging heat and moisture from attic space. Wind powered turbine maximizes ventilation capacity while geared towards going green. Whirlybird turbines are backed with the best guarantee in the business - the quality and performance of the Lomanco Whirlybird is guaranteed forever. Includes roof pitch gauge to help determine roof pitch.