Broan ZN80ML Ultra Green Multi-Speed Motion Sensing Fan/Light (80 CFM, 0.3 Sones) 80 CFM quickly reduces humidity to prevent or eliminate fogged mirrors and manage moisture in bathrooms up to 70 square feet, so your vision will always be clear and your surroundings will always be comfortable ULTRA Sense M, Motion Sensing Technology, offers a hands-free solution for maximum convenience Multi-Speed operation handles demanding spot ventilation needs, but can also pull double-duty as a great continuous ventilation solution to meet today's stringent requirements ULTRA Lucent Lighting Technology provides 36 watt lights (two 18-watt bulbs included) delivering the brightness (measured in lumens) of models previously requiring 60 watts of CFL output