This high-performance, Class A Fire Rated, shingle-over ridge vent is designed with an internal weather filter and external baffles and proves that outstanding beauty and performance can be combined. This ridge vent is 7" wide so it can be used with many enhanced ridge and cap shingles. CertainTeed Ridge Vents combined with sufficient intake vents, such as CertainTeed Intake Vent, are the most efficient and effective systems you can install. Class A Fire Rated Works year-round to ventilate the attic Provides evenly distributed ventilation along the entire underside of the roof Slim design for visual appeal Provides a higher volume of airflow per square foot of attic area than any other fix system Design maximizes airflow across the entire underside of roof sheathing Changes in wind direction have no significant effect on vent performance