Delta Breez SLM70 Slim 70 CFM Exhaust Fan Noise level of 2.0 sones, 3" Duct (Standard) An indicator light underneath the grille assures you that this quiet fan is running ENERGY STAR qualified 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. Sets the bar for performance in the popular small fan size of 7.5 x 7.25 x 3.94 inches. Grille size-9.375 x 10.75 inches Noise level of 2.0 sones An indicator light underneath the grille assures you that this quiet fan is running ENERGY STAR qualified 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