Abstract: Specifically configured gas compressors in a piping system will provide clean, gas heating and recirculation that will quickly and efficiently heat a connected process chamber or process piping section. Substantial heat is quickly generated through mechanical agitation of the gas molecules that pass through the inlet and outlet of a dual rotor-multiple lobe per rotor, rotary gas compressor. The application of a rotary gas compressor as a means of imparting heat to a gas stream provides an economical source of convective heat for closed and open loop piping applications.