VIVOSUN 4 Inch Inline Duct Fan 100 CFM HVAC Exhaust Ventilation Fan with Low Noise for Basements Bathrooms Kitchens and Attics Silver

VIVOSUN inline duct fan helps with ventilation issues. This duct fan is perfect for boosting airflow in long runs of ducting. Tight precise construction eliminates rattling and reduces wear and tear to give the element a long life.