This 240 CFM ventilation fan is designed for multiple-task ventilation, which means ventilating multiple areas or multiple rooms with one fan. Place Panasonic Bathroom Fan inlets over the shower, tub, toilet and/or vanity in a single bathroom and use just one fan. In recent years, homes have become more airtight and energy efficient. While this lowers the cost to heat and air-condition a home, it also retains pollutants that can be hazardous to its occupants. Wattage: 57W.