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The core purpose of this report was to collect data that would be of use in promoting commissioning of new and existing buildings. A secondary purpose was to define methods for determining costs, benefits, and persistence of commissioning along with understanding national differences in the definition of commissioning. Research was grouped under two broad headings: Commissioning Cost-Benefit, and Commissioning Persistence. Commissioning Cost-Benefit Literature Review of Commissioning Cost-Benefit Methodologies Twelve studies were summarized, focused on studies where the cost-benefit methodologies were known. The majority were research studies of multiple buildings, and the studies ranged from research reports, databases, and marketing literature. These studies are summarized in three main aspects: 4. What problems were found, and the solutions, and 5. Non-energy benefits. Collected data was collated in spreadsheets for analysis and generation of charts of the key findings. Commissioning Persistence Literature Review on the Persistence of Commissioning Benefits This review summarized the findings from five studies encompassing 37 commissioning projects from across the USA. Persistence of savings was expressed as a percentage of the original claimed savings, after a specified time has elapsed after the project (e.g., 75 % after five years). In addition to evaluating project savings, the studies covered persistence at the level of specific measures, including the reasons for measures not persisting. Impact of Savings Normalization Method on Commissioning Persistence This study reviewed two weather normalization methods that are used in calculating energy savings from commissioning, and compared their impact on commissioning persistence claims. The two methods evaluated were: International Performance Measurement and Verification Protocol (IPMVP) A baseline regression model (or calibrated simulation model) is created based on the precommissioning energy use and recorded temperature/humidity. In the post-commissioning period, weather data is collected, and the regression model is used to predict what the energy use would have been if commissioning hadn't occurred. The actual energy use is subtracted from the modeled prediction, and this constitutes the energy saved. Normalized Annual Consumption (NAC) Similar basic principle to the IPMVP; a regression model (or calibrated simulation model) is created using baseline data. This model is applied to a standardized 'average' weather year based on the site location in order to calculate baseline annual energy use. In the postcommissioning period the regression model is recreated using post-energy and post-weather data, and this regression model is applied to the same 'average' weather year. The difference between the two modeled average years constitutes the savings. Examples of Tools for Enhancing Persistence of Commissioning Benefits There are a number of data collection and analysis tools that may be used for monitoring the persistence of commissioning improvements. This...

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