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We propose a new space-centric policy for fair apportionment of energy in shared environments and demonstrate a method for automatically determining space-centric energy zones. In this work, we design and implement ePrints, a system for tracking personalized energy usage in real-time. ePrints supports different apportionment policies, with microsecond-level footprint computation time and graceful scaling with size of building, frequency of energy updates, and rate of occupant location changes. Finally, we present applications enabled by our system, such as mobile and wearable applications to provide users timely feedback on the energy impacts of their actions, as well as applications to provide energy saving suggestions and inform building-level policies.<\/jats:p>","DOI":"10.1145\/3218582","type":"journal-article","created":{"date-parts":[[2018,11,27]],"date-time":"2018-11-27T13:18:59Z","timestamp":1543324739000},"page":"1-25","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":7,"title":["A Scalable System for Apportionment and Tracking of Energy Footprints in Commercial Buildings"],"prefix":"10.1145","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3102-6601","authenticated-orcid":false,"given":"Peter","family":"Wei","sequence":"first","affiliation":[{"name":"Columbia University, New York"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xiaoqi","family":"Chen","sequence":"additional","affiliation":[{"name":"Tsinghua University, Beijing, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jordan","family":"Vega","sequence":"additional","affiliation":[{"name":"Columbia University, New York"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Stephen","family":"Xia","sequence":"additional","affiliation":[{"name":"Columbia University, New York"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Rishikanth","family":"Chandrasekaran","sequence":"additional","affiliation":[{"name":"Columbia University, New York"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xiaofan","family":"Jiang","sequence":"additional","affiliation":[{"name":"Columbia University, New York"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"320","published-online":{"date-parts":[[2018,11,27]]},"reference":[{"key":"e_1_2_1_1_1","volume-title":"Proceedings of the 23rd International Conference on Distributed Computing Systems Workshops","author":"Anastasi G.","unstructured":"G. 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