Accounting for about 40 percent of energy consumption in the United States and contributing more carbon dioxide to the atmosphere than entire nations, existing buildings are becoming the proverbial elephant in the room of energy security. Few had the benefit of commissioning when built and even fewer have undergone existing-building commissioning (EBCx), or, as it was more commonly (and less accurately) known, retrocommissioning. Although it has been around since the early 1990s, EBCx is ...

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