PTC has a unique heat property that allows the PTC heat output to be regulated by the airflow applied. The higher the airflow, the higher the heat output and power (wattage). Therefore, depending on the end design, if the ambient temperature is high, the PTC output power will decrease; if the airflow is high with low ambient temperature, then the PTC output power will increase. PTC air heaters are widely used in air conditioning, smart shoe box, hand dryers, central air conditioning, dryers, dehumidifiers,humidifiers, dryers, electronic sterilizer, automobile air conditioning heating equipment, etc.