Air Vent 5700-CFM 30-in Aluminum Single Belt Drive Whole House Fan in the Whole House Fans department at Lowes.com
Centrifugal Kitchen Roof Exhaust Fan 2600-4900 CFM 1400 RPM
Ventilation Fan - Box (Belt Drive), Ventilator, Ventilation Fan, exhaust fan - Taiwan Ventilator, Ventilation Fan, greenhouse fan in Ventilation Fans on ttnet.net
Belt Drive, Includes Drive Pack, Centrifugal Downblast Roof Exhaust Fan - 7A683|7A683 - Grainger