The DeltaBreez Green Builder Ventilation Fan marks a new achievement in ventilation for green construction. Featuring a 26-Watt CFL lamp and compact housing 8.25-Feet by 8-Inch by 5.75-Inch while operating at 88-Percent less noise, and using up to 89-Percent less energy. with power consumption as low as 4.3-Watt, energy costs for operating these fans 24/7 for an entire year is as little as $4.52. Featuring DC brushless motor technology, the fans are built to run continuously for more than 70,000 hours. The DeltaBreez Green Builder is the quietest 4-Inch duct ventilation fan light combination with this popular housing size in the market today.