Abstract: A heater with positive thermal coefficient of resistance (PTC) elements is disclosed, which includes a substrate and a first and second electrodes spaced apart a predetermined distance from one another and disposed on the substrate, a plurality of conductive strips alternatingly i) extending from the first electrode towards the second electrode terminating by forming an air gap with the second electrode, and ii) from the second electrode towards the first electrode terminating by forming an air gap with the first electrode, one or more resistive elements disposed on each of said alternating conductive strips, thereby making electrical connectivity with a neighboring alternating conductive strip, and a voltage source coupled with both the first and second electrodes, whereby selective voltage of the voltage source determines temperature of the heater.