For larger bathrooms needing 6-inch ducts, the 130 cfm WhisperGreen® FV-13VKM2 ventilation fan by Panasonic, exhibits extraordinarily low sone levels for remarkably quiet operation. This Energy Star® rated fan features a motion sensor, variable two-speed and built-in delay timer controls. For 4-inch ducts, there is an 80 cfm version available.

Panasonic Home & Environment Co.