● 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