Air Vent Venturi Vent Plus - Carton of 10 4 Foot Pieces

Net Area: 18 square inches per feet Size: 4 feet Ridge vents must have an external baffle to deflect weather away from the attic and to create low pressure over the vent openings to help pull air out of the attic May not provide enough ventilation area on steep hip roofs With all roofs, install ridge vents along the entire length of ridge for best performance and appearance. (With vaulted or cathedral ceilings: Each attic [joist] cavity must be ventilated, leaving 1-1/2" between sheathing and insulation) Intake vents must be installed to provide proper airflow External baffle shingle-over Built-in ventilating end plug Provides evenly distributed ventilation along the entire underside of the roof Slim design, visual appeal Works year-round Provides a higher volume of airflow per square foot of attic area than any other fixed-vent system Design maximizes airflow across the entire underside of roof sheathing Changes in wind direction have no significant effect on vent performance