This report describes the results of a series of telephone interviews with groups of users of information on solar industrial and agricultural process heat (IAPH). These results, part of a larger study on many different solar technologies, identify types of information each group needed and the best ways to get information to each group. The report is one of ten discussing study results. Results from ten IAPH groups of respondents are analyzed in this report: IPH researchers; APH researchers; representatives of manufacturers of concentrating and nonconcentrating collectors; plant, industrial, and agricultural engineers; educators; representatives of state agricultural offices; and county extension agents.