S04 -- Air Handling and Distribution (I-P)

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