The U.S. Department of Energy (DOE), Office of Energy Efficiency and Renewable Energy (EERE), Building Technologies Program (BT) commissioned this assessment of heating, ventilation, and airconditioning (HVAC) technologies for U.S. commercial buildings. The main objectives of this study were to: Identify a wide range of technology options in varying stages of development that could reduce commercial HVAC energy consumption; Provide in-depth analysis of priority technology options, including: technical energysavings potential 1 ; applicability to different building or HVAC equipment types; nonenergy benefits; and perceived barriers to market adoption. Develop suggestions for potential research, development and demonstration (RD&D) initiatives that would support further development of the technology options that are most promising based on technical energy-savings potential, potential fit with DOE BT's RD&D portfolio, cost and complexity, and other factors. viii U.S. Department of Energy Figure ES-1: Selection and Screening Process We first generated a comprehensive list of 182 technology options (listed in Appendix A) from a variety sources including: manufacturers' websites, industry publications, government organizations, university research, and internal Navigant experts. Through this initial survey, we cataloged general information about each technology such as its potential energy-efficiency impact and potential applicability to various commercial HVAC systems. After examining the initial list, we removed 125 technology options , leaving 57 technology options that demonstrated the highest potential to reduce HVAC energy consumption in commercial buildings, but that have not yet been adopted widely by the market (see Table ES-1). Step 1-Develop initial list of technology options Step 2-Develop the initial screening criteria Step 3-Identify 50 to 70 technology options for preliminary study Step 4-Analyze energy savings potential, economics and barriers for adoption of the selected technology options Step 5-Develop scoring criteria to evaluate the selected technology options Step 6-Select 15 to 20 technology options for more in-depth study ix U.S. Department of Energy Table ES-1: 57 Technology Options Selected for Further Study Components (24) Equipment (13)
