Pulse combustion can gain high pressure flue, utilizing the combustion-driven oscillation phenomena. This well-kuown technology has been realized recently by the advance in new technology and also the demand to energy saving. The majour problems in the burner development are how to tune the total system and how to cut noise. The burner was applied as the industrial liquid heater and proved to be highly efficient, not only because of the heat transfer improvement but because of the small heater size. Applications to the painting process and to the galvanizing process were introduced.