This listing is for a new Fantech FG 4XL inline centrifugal fan designed for 4-inch duct applications and rated at 170 CFM. It features a metal housing and EC motor, which may be useful for buyers comparing build materials and motor type before purchase. Free shipping is included, which can help when estimating total cost. This item may suit shoppers looking for an inline fan for ventilation setups that use 4-inch ducting. If you are replacing an existing unit, the model number, duct size, and airflow rating are key details to compare with your current system. Check the listing for full details. NEW Fantech FG 4XL Inline Centrifugal Fan 4" Duct 170 CFM Metal Housing EC Motor. Color: Silver, Condition: New, Made in United States. Listed at 145.00 USD. Fantech FG 4XL EC is a. Part No: FG 4XL EC. Airflow Capacity : Up to 180 CFM at 0" static pressure. Housing : Airtight, 22-gauge galvanized steel construction. Fan Motor: R3G133-RD09-10. Motor Type : Energy-efficient ECM (Electronically Commutated Motor).