The ASHRAE Advanced Energy Design Guide for Small Warehouses and Self-Storage Buildings is the fourth in a series designed to provide recommendations for achieving 30% energy savings over the minimum code requirements of ANSI/ASHRAE/IESNA Standard 90.1-1999. This Guide focuses on warehouses up to 50,000 ft2 and self-storage buildings that use unitary heating and air-conditioning equipment. Buildings of this type with these HVAC system configurations represent a significant amount of commercial warehouse space in the United States.