Broan’s XB50 ULTRA GREEN Series 50 CFM 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.