During the preconceptual design phases of a reactor study, many configuration alternatives must be evaluated in a short period of time. A Tandem Mirror Reactor Systems Code (TMRSC) has been developed as a tool in such evaluations. Since plasma heating systems can significantly impact the capital cost and the operational characteristics of a reactor, a heating systems module is an important element of the TMRSC. The module's primary purpose is to supply line power requirements, direct capital costs, and auxiliary system information from a set of physics requirements and general design specifications. The description of the module and some results are presented.