The proposed heat pathway heuristics (HPH) is used in conjunction with Luyben's plantwide control procedure to model heat pathway management systems and the control configuration of a complex energy-integrated hydrodealkylation of toluene (HDA) plant. Various heat pathways throughout the network are systematically investigated for the purpose of plantwide energy management. An appropriate heat pathway is selected by means of a selective controller with low selector switch (LSS) to direct the disturbance load to a heating or cooling utility unit in order to achieve dynamic maximum energy recovery (DMER). Such control system is rigorously examined in HYSYS' dynamic simulation environment. The comprehensive details of modeling and dynamic simulation of heat-integrated HDA plant are given. As shown in dynamic simulation study, the heat pathway heuristics (HPH) is therefore considered useful to achieve the highest possible DMER.