Humidity setting range: 10-80%. When the space humidity reaches the set humidity, the fan will automatically stop running, and when the space humidity is higher than the set humidity, the fan will automatically run.Antifreeze Thermostat: When the outdoor temperature drops below 37 'F/2.8 'C, the fan stops running. When the outside temperature rises to close to 50 'F/10'C, the fan will resume normal operation. Specifications Color Silver Electric fan design Exhaust Fan Power Source AC Style Modern Product Dimensions 4.5"D x 16.1"W x 11.8"H Room Type Attic, Garage, Basement Recommended Uses For Product Air Circulation Special Feature Waterproof, Dustproof Noise Level 55 dB Collection Name VentirMax S Included Components Cord