The Greenheck G-080-DGE117XQD Centrifugal Downblast Exhaust Fan is a direct-drive, roof-mounted ventilation fan designed for general clean-air exhaust applications. It uses a centrifugal wheel to draw stale indoor air through the HVAC ventilation system and discharge it downward toward the roof. With a 115V, 1/20 HP motor and 134–495 CFM airflow range, it suits commercial and light in... https://www.partshnc.com/greenheck-g-080-dge117xqd-centrifugal-downblast-exhaust-fan