Book excerpt: Introduction to Thermography Principles provides an overview of the latest information on the safe, efficient, and practical use of thermal imagers. This full-color textbook depicts thermal images of electrical, HVAC, plumbing, hydraulic, and pneumatic circuits. Real-world examples illustrate commercial, industrial, municipal, and residential applications. In addition, the textbook provides information on thermography analysis, reporting, documentation, return on investment resources, and related technologies.