Greenheck USF-333-10-BI-100-X, 10 HP Centrifugal Fan Exhaust Blower | eBay
Greenheck SP-AP0511WC MasterSpec High-Performance Healthier Ventilation Fan with Speed Controls Plus CO2 Sensor, 50-80-110 CFM, Constant CFM, Certified Air Flow, Quiet EC Motor, White - Walmart.com