In many industries where the heating or cooling process comes into play, the process will probably have some type of heat exchanger or condenser. In large-volume processes, these units can be enormous; easily large enough to bodily enter and do assigned work. But many of these units may not get identified as a Permit-Required Confined Space (PRCS) during the site evaluation because of their design; however, every once and a while, these units have their “tubes/bundles” pulled and thus, we go from a “nothing space” to a PRCS that needs a Danger Sign and a different energy isolation plan. Let me explain…