The Schneider Electric (Viconics) VH7200A1000 Humidistat with Outdoor Reset is a digital humidity controller designed to maintain precise indoor humidity levels in commercial and institutional HVAC systems. It continuously monitors indoor relative humidity and outdoor temperature, automatically adjusting humidification and dehumidification setpoints to optimize comfort, reduce condens... https://www.partshnc.com/vh7200a1000-schneider-electric-viconics-humidstat-woutdoor-reset