EXHAUST FAN KIT: Kit includes components to install a single exhaust system using a 4-inch duct, fan, grille, and two sleeves with dampers and duct clamps for an easy installation process EFFICIENT: Operates on 110 CFM and 0.6 Amps to ensure a high-quality, quiet performance every use in rooms up to 105 sq. ft. GREAT FOR LARGE SPACES: This housing can be installed in the attic or basement - wherever is most convenient, making this fan great for large, open spaces SAFE: Ventilation fan is ENERGY STAR Certified for quality you can rely on during day-to-day use COMPACT: 4" duct size is great for fitting in your bathroom ceiling or other out-of-the-way spots to provide discreet and effective ventilation