Delta Breez SIG110L Signature 110 CFM Exhaust Fan with Light Quiet operation at 0.4 sones An indicator light underneath the grille assures you that this quiet fan is running ENERGY STAR Most Efficient for efficient cost-saving operation Precision engineered with DC brushless motor for extended reliability, this fan will outlast many household appliances Galvanized steel construction resists corrosion, equipped with metal duct adapter