Broan®'s XB80 Ultra Green™ series 80 cu-ft/min ceiling bathroom exhaust fan delivers everything you wished for in a bath fan. Premium ventilation helps reduce airborne pollutants. It has extremely quiet operation, energy efficiency, consistent power and most impressively, the fastest, easiest, most universal installation available. These fans are ideal for spot ventilation in humid bathrooms. They also work well providing continuous ventilation to meet various building codes and green building standards around the united states. 80 cu-ft/min, effective ventilation to remove moisture and reduce the risk of mold or mildew in most full baths <0.3 sones for ultra quiet performance, you might not notice it's on UltraQuick™ installation technology uses an exclusive telescoping mounting frame with pre-installed screws Snap-in housing, snap-in blower and an inside out mounting duct connector for the fastest, easiest, most universal installation Mounting frame fits any type of joist, I-Joist or truss construction for a no guesswork Installation to make the work fast and easy