PTC Thermistors as Heaters has the following advantage, compared with other heating elements:

• No overheat, Safe through temperature limiting characteristics.
• No danger of fires since there are no glowing parts.
• Dynamic, self regulating, and therefore energy efficient.
• No excess temperature protection required.
• Voltages from 6V to 480 V; special voltage applications up to 800 V.
• PTC thermistor surface temperatures can be set from 50C to 320C.
• Compact design.
• Long service life.