... , air conditioner system for electric car, discharging loader for battery.Convecting type: moistureproof and dew proof for electronic equipments, heating for electronic controll case, ... methods, direction of the heater;2)Keep air flowing itself for heat could be diffused;3)The heating power will be ... rated voltage, DC or AC, are possible;3) UL file for PTC pellet: E207611;4) The power would be larger 2 ...