
EcoVent Ventilation Fan Housing, 120V/60Hz, CFM: 50-70. 80-110, 4" Duct Diameter EcoVent is a powerful ventilation fan that delivers high performance ventilation you can count on for all your projects. It is an ideal solution for home builders looking for a cost effective, ENERGY STAR rated fan. With a built-in two-speed selector (70/90 CFM), EcoVent delivers customizable airflow to give you peace of mind during verification testing. Available in both single and contractor packs.