Profile: Epcon Industrial Systems NV, Ltd., specializes in custom designing and manufacturing pre-engineered and pre-tested air pollution control systems, ovens, finishing systems and specialty systems. We provide innovative pollution control technology including process analysis, engineering, equipment manufacturing and installation. We offer system rebuilding and repair services. Primary Heat exchangers are heat exchangers which use the recently combusted hot gas to pre-heat the process gas entering the Oxidizer. These kinds of heat recovery systems save energy costs by reducing the amount of fuel required to maintain combustion.