Technical and environmental factors and considerations for engineers designing HVAC systems that serve justice facilities are presented in this chapter. Most of the information presented is for facilities in the United States; regulations in other parts of the world differ significantly, and the authorities governing these facilities should be consulted directly. Refer to the 2020 ASHRAE Handbook—HVAC Systems and Equipment for further information on HVAC systems and equipment mentioned herein, and to other chapters of this volume for various space applications and design considerations. Terminology General System Requirements Courthouses Forensic Labs Indoor Shooting Ranges