The Delta BreezSmart SMT150D marks a new achievement in ventilation for green construction with powerful performance at very low noise and low power consumption. This quiet energy efficient exhaust fan features adjustable continuous low speed control and an adjustable delay timer. Air flow of 150 CFM with loudness rating at less than 0.3 sones at full speed. Power consumption of 16.9 Watts with energy efficiency rating of 8.8 CFM per Watt. Features a DC brushless fan motor for extended reliability. ENERGY STAR qualified and HVI certified.