The Broan® ZB110 ULTRA GREEN™ Multi-Speed Ceiling Bath Fan gives a premium performance for today's demanding home ventilation requirements. 110 CFM quickly reduce humidity and manage moisture in bathrooms up to 105 sq. ft. ULTRASilent™ technology operates at the lowest sound rating achievable, less than 0.3 sones. The ULTRASmart DC motor and control technology provides energy efficiency almost 10 times greater than ENERGY STAR® requirements. With ULTRAQuick™ installation technology the ZB110 provides the fastest, easiest, and most universal installation in remodel, retrofit, and new construction. The Broan® ZB110 has been specifically designed to meet both spot and continuous ventilation needs for various building codes and green building standards.