QuFresh ENERGY STAR Slim Line Bath Fans are the ultimate in versatility for home and commercial use, offering odor ventilation, mildew prevention, and moisture reduction in a bathroom, laundry room, or utility space. Constructed using a low profile steel housing perfect for wall or ceiling mount installations and 4 in. oval duct connector with a spring-installed polymeric grille cover. This exhaust fan includes hanger bars and mounting tabs for easy installation against a joist or stud, and a motor with 3 speed selections (50 CFM, 80 CFM, or 100 CFM) with wiring knockouts on the housing. The SL100-3H's ECM motor is highly efficient no matter which CFM setting you choose, operates quietly from 0.6 - 1.2 sones, and is triggered to operate on demand when threshold is met with the built-in humidity sensor. Color: White.