Building commissioning (Cx) is a process for assuring efficient building operations that can be applied to new construction and existing buildings, resulting in energy and non-energy benefits. Quantifying the benefits of commissioning is challenging, but a 2009 study of 643 commercial buildings provided a solid initial data set to which we added 839 additional buildings for a significantly expanded and updated meta-analysis representing 34.7 million square meters (373 million square feet) of floor area. Since 2009 the commissioning industry has continued to grow, driven by building codes, utility programs, and rising awareness of commissioning benefits. In parallel, building controls have become more sophisticated, and analytics software has emerged to assist with commissioning. We find that delivery mechanism and market segment are key determinants of outcomes, although significant and cost-effective savings are found across the spectrum. Median primary energy savings for Cx projects in existing buildings ranged from 5 percent for those conducted under utility programs, 9 percent for monitoring-based commissioning utility programs (i.e., augmented with submetering and diagnostics), and 14 percent for Cx projects outside of utility programs. Across all project types, median savings ranged from 3 percent for the lodging market segment to 16 percent for public order and safety facilities. Outcomes did not vary significantly by building size or by market segment. Energy savings are rarely estimated for new construction commissioning. We found that the median costs of Cx were lower for the 2018 sample than for the 2009 sample—$2.85 per square meter ($0.26 per square foot) for existing buildings (a 33 percent reduction) and $8.78 per square meter ($0.82 per square foot) for new construction (a reduction of almost 50 percent). The median simple payback time for existing buildings was 1.7 years, with a 25th–75th percentile range of 0.8–3.5 years. This article summarizes these and other key findings, and discusses how the 2018 data reflects shifts in commissioning practice and outcomes.

建筑物调试（Cx）是确保可应用于新建筑物和现有建筑物的高效建筑物运行的过程，从而带来能源和非能源效益。量化调试的收益具有挑战性，但是2009年对643座商业建筑的研究提供了可靠的初始数据集，我们在其中增加了839座建筑物，以进行显着扩展和更新的荟萃分析，代表3470万平方米（3.73亿平方英尺）的建筑面积。建筑面积。自2009年以来，在建筑法规，实用程序和对调试好处的意识不断增强的推动下，调试行业持续增长。同时，建筑控制变得更加复杂，并且出现了分析软件以协助调试。我们发现，交付机制和市场细分是决定结果的关键因素，尽管在各个方面都可以节省大量成本且具有成本效益。现有建筑物中Cx项目的一次能源节省的中位数范围为：在公用事业计划下进行的项目的5％，基于监视的调试公用事业计划（即增加了子计量和诊断）的9％以及在公用事业计划之外的Cx项目的14％ 。在所有项目类型中，住宿费用中位数节省范围从住宿市场细分的3％到公共秩序和安全设施的16％。结果因建筑物规模或细分市场而变化不大。很少为新建筑调试节省能源。我们发现，2018年样本的Cx成本中位数比2009年样本低-现有建筑物每平方米2.85美元（每平方英尺0.26美元）（减少了33％），每平方米8.87美元（每平方英尺0.82美元）用于新建筑（减少了近50％）。现有建筑物的简单投资回收期中位数为1.7年，第25至75个百分位数范围为0.8至3.5年。本文总结了这些和其他主要发现，并讨论了2018年的数据如何反映调试实践和成果的变化。范围在0.8-3.5年之间的第25-75个百分点。本文总结了这些和其他主要发现，并讨论了2018年的数据如何反映调试实践和成果的变化。范围在0.8-3.5年之间的第25-75个百分点。本文总结了这些和其他主要发现，并讨论了2018年的数据如何反映调试实践和成果的变化。