Members of Tierra’s staff evaluated Puget Sound Energy’s 2012-2011 C&I DSM portfolio. The impact evaluation involved conducting site visits to collect performance and operation information, extensive data analysis, regular status updates with the client and a final report to be submitted to the Washington Utilities and Transportation Commission (WUTC). A wide range of technologies were evaluated including: gas boilers and furnaces, lighting controls, building energy management systems, VFDs on pumps and motors, industrial refrigeration upgrades, air compressor replacements, building envelope improvements, building commissioning, HVAC retrofits, and many other custom projects. Data collection efforts utilized a mix of data loggers, billing analysis, gas analyzers, in-situ power measurements, staff interviews, and EMS trend data to determine individual project effectiveness. Through this project Tierra also developed EE measure cost data applicable to the greater NW region.