Very early in the design of a new or retrofit building project, the HVAC design engineer must analyze and ultimately select the basic systems, as discussed in Chapter 1, and whether production of primary heating and cooling should be decentralized (see Chapter 2) or central (see Chapter 3). This chapter covers the options, processes, available equipment, and challenges of all-air systems; for all-water, air-and-water, and local terminal systems, see Chapter 5. For additional system selection tools, refer to the HVAC System Analysis and Selection Matrix in ASHRAE Handbook Online (handbook.ashrae.org).

AIR-HANDLING UNITS
Air-Handling Unit Psychrometric Processes
Air-Handling Unit Components
Air Distribution

AIR-HANDLING SYSTEMS
Single-Duct Systems
Dual-Duct Systems
Multizone Systems
Special Systems
Air Terminal Units
Air Distribution System Controls
Automatic Controls and Building Management Systems
Maintenance Management System
Building System Commissioning

ISBN: 978-1-947192-53-9 (for SI versions of chapters)
ISSN: 1930-7705 (for SI versions of chapters