Guard against roof system degradation, ice damming, and mildew growth with the Cobra IntakePro Rooftop Intake Vent. The vent also helps improve attic ventilation airflow by up to 20% when installed with existing soffit or under-eave vents in a balanced ventilation system. The Cobra IntakePro also reduces hassles for roofing contractors by eliminating the need for time-consuming alterations at the soffit. Instead, the vent rolls out and fastens with 1 3/4-inch coil nails (included). The versatile and durable vent is tested to withstand wind-driven rain, snow, and ice dam infiltration. Check with your distributor for pricing.