Designed for retrofit and new applications, Broan-NuTone’s LoProfile fans can be installed between 2 by 4 wall studs. The Energy Star-qualified fan includes a 4-in. oval duct connector and a transition for 4-in. oval to 3-in. round ducts. It operates at 80 CFM and 1.1 sones. Additional features include motor engineered for continuous operation and being UL-listed for use over bathtubs or showers with a GFCI circuit.