MAXIMUM AIR FLOW: The InOvate DryerJack Extra Clearance is one of the most efficient dryer roof vents available. Its unique curved damper and spacious vent opening provide superior airflow which allow for optimal dryer function and reduce the risk of excess lint buildup. The taller profile of the extra clearance model provides needed clearance for tile roofs or high snowfall locations. PROTECTION FROM THE ELEMENTS: Several design factors have been thought of to provide intrusion protection from birds, rodents, and rain. These include how the damper fits inside the hood when closed, and a seamless hood design to help prevent water leaks in the exhaust duct. EASE OF ACCESS: The DryerJack Extra Clearance was designed to be cleaned thoroughly without the need for extra work or tools. A regular cleaning will help ensure your vent is running as efficiently as possible and save you time and worry. QUALITY CONSTRUCTED: The DryerJack Extra Clearance is solidly constructed from heavy gauge Galvalume and is designed to perform for a long time. It comes with rounded flange corners for ease of handling and includes built-in nail holes for quick installation. The InOvate DryerJack Extra Clearance is one of the most efficient roof vents in the industry. The position and curvature of the damper, combined with hood size, optimize airflow to such a degree that laboratory tests confirm only the most marginal reduction in airflow. Terminating the shorter duct run with a DryerJack helps venting through the roof deliver on the promise this shorter route offers. Every InOvate DryerJack Extra Clearance is built tough right here in the U.S.A. Its design is airflow efficient, and deters pest entry. It includes a removable access door for easy duct cleaning. The InOvate DryerJack Low Profile with Roof Neck is optimally designed for roof pitch between 3/12 and 12/12. Roof pitch in excess of 45 degrees will render the damper ineffective.