... water is dried, it's no trouble. Notice for manufacturer and consumer:PTC as heating element, it fits ... maintain temperature of water is very excellent and also low cost.For getting higher power, let water flowing or convection, ... , the reliable will reduce. 2. Classify by structure for PTC heatingTypeSpecialtyExcellenceshortcomingOthersTransflux heaterWater transflux hole of the heaterLarge power, ...