Panasonic FV-WCCS1-W WhisperControl Condensation sensing element Switch, WhiteWhisperControl Condensation sensing element on exhaust fan to keep back humidity. Advanced sensor technology someone humidity and temperature for top-level accuracy. Fan automatically off when the pertinent combination of temperature and humidity is reached, in all climate zones and for all seasonsPanasonic FV-WCCS1-W WhisperControl Condensation sensing element Switch, White Features : sympathetic with all individual Speed and/or individual Speed Lite ventilation products faddish decorator design with wall plate included LED Indicator unchaste ASHRAE 62.2, LEED for Homes, ENERGY STAR IAP, CA Title 24, EarthCraft and WA Ventilation Code tractable ENERGY STARÂ Qualified Count Down Timer LEED & CALGreen tractable Humidity Control vade mecum ON and OFF Switch Manufacturer 1 year narrow warranty .