Book excerpt: The 2016 ASHRAE Handbook-HVAC Systems and Equipment discusses various systems and the equipment (components or assemblies) they comprise, and describes features and differences.This information helps system designers and operators in selecting and using equipment. ASHRAE Technical Committees in each subject area have reviewed all chapters and revised them as needed for current technology and practice. An accompanying CD-ROM contains all the volumes and chapters in both I-P and SI units.