The book will be published in a flexible, 5 x 8 format filled with schematic system layouts and graphics showing how commonly measured data can be used to identify operating problems with the HVAC equipment. It is expected that about one quarter to one third of the book will be line drawing system schematics, graphics showing expected data in fault and no-fault states, and a few photographs of systems (used only when such a figure is required for clarifying points made in the text.)