The Facility Energy Decision System (FEDS) is a building energy modeling tool developed by Pacific Northwest National Laboratory. FEDS excels at modeling multiple buildings while measuring the interactive effects of all building systems, including total energy consumption, peak demand, and life-cycle costs. These data are used by the model to suggest appropriate prioritized retrofits for a site. Additionally, the results can be utilized to simulate metered data or estimate custom engineered project savings that otherwise are not seen in FEDS. In one case, the results helped a site to realistically allocate fuel consumption charges to tenants, since there were no meters to rely on. In another case, a FEDS analysis was used to develop a baseline energy use for the current building configuration, and then a modified version of the original model provided the post-retrofit energy consumption. Ideally, meters would be in place to help solve these issues, but using FEDS is a suitable alternative when metering equipment is not available or practical.
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