Sensaire technology-Responds to increases in humidity rather than waiting for condensation to form or a relative humidity set point to be reached. It responds before moisture has chance to form to clear mirrors more quickly;Precise sensitivity adjustment-Variable setting from 20% to 80% relative humidity so the fan works when the homeowner wants it to regardless of climate or season;Continuous ventilation mode-Operates fan for set minutes per hour to achieve targeted average CFM levels and efficiently meet ASHRAE 62.2 whole house mechanical ventilation (WHMV) requirements;Sensaire with relative humidity set point mode-offers the flexibility to satisfy local range-of-adjustment codes;Decorator style design with settings behind concealed door - blends in seamlessly with existing switches;User-adjustable delay shut-off timer - allows run-time customization for different bathrooms;Manual operation mode for ultimate user control;Can be used to comply with California Title 24 and CALGreen;Fits single-gang box; 120 VAC, 60 Hz;Faceplate not included;Requires neutral wire for operation;5-year warranty;Also available as model P82W, the same humidity sensing wall control in a retail-friendly clamshell package