Air Vent 85154 Square Roof Mounted Vent, Aluminum, Black Summer10 Standard Reduced Pressure Setting-PSI -

Standard Reduced Pressure Setting-PSI - 15

This intuitive fan control uses an easy-to-turn knob to adjust your fans to the perfect speed for comfort

alloy steel beam is made strong and reliable

With end connector

Air Vent 85154 Square Roof Mounted Vent, Aluminum, Black Summer10 Standard Reduced Pressure Setting-PSI -All aluminum rust free construction. Hood & throat designed to maximize airflow. Heavy, rust free integral screen. Provide 50 square inches of net free area. UH50BL Square shape Color: Black Hood & throat designed to maximize airflow All aluminum rust free construction Heavy, rust free integral screen Provide 50 square inches of net free area 9" diameter opening As hot air rises the vent allows the hot air to escape Should be installed up towards peak