50/80/110 CFM Ceiling Mount Bathroom Fan with Pick-A-Flow and 4 Inches Duct

. 50/80/110 CFM large airflow capacity for enclosed room up to 50-120 sq. ft. 0.3/0.8/1.5 sones low noise won't disrupt the tranquility of your bathroom. Galvanized sheet housing for longevity and continued performance. Multi-blade wind wheel maximizes ventilation efficiency. Advanced check valve to avoid backflow of dirty air. 2 ways to install: joist mounting or wall mounting. With both Energy Star and HVI certifications for reliable use. Wiring diagram: black-lead wire, green-ground wire, white-neutral wire