According to the 2014 HVAC and Building Automation Systems (BAS) Study conducted by Consulting-Specifying Engineer, the average annual dollar amount of HVAC and BAS products specified is S2.63 million. While this includes traditional products and systems-like air handlers, fans, and pumps-it also includes more nontraditional systems, including chilled beams and variable refrigerant flow (VRF) systems. Building owners have the option to incorporate VRF systems into their buildings, and these "alternative" system manufacturers field many questions from interested engineers and building owners, though they may not be gaining momentum (see sidebar, "VRF market presents dilemma for engineers"). An overview of these systems and some best practices have been provided by Julianne Laue, PE, LEED AP BD+C, BEMP, senior energy engineer at the Center for Energy Performance, Mortenson, Minneapolis.
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机译：根据咨询指定工程师进行的2014年HVAC和楼宇自动化系统（BAS）研究，指定的HVAC和BAS产品的年均美元金额为263万新元。尽管这包括传统产品和系统，例如空气处理机，风扇和泵，但它还包括更多非传统系统，包括冷梁和可变制冷剂流量（VRF）系统。建筑物所有者可以选择将VRF系统整合到建筑物中，这些“替代”系统制造商会回答感兴趣的工程师和建筑物所有者的许多问题，尽管他们可能并没有获得发展的动力（请参见附文，“ VRF市场给工程师带来了困境”） 。明尼阿波利斯莫滕森能源绩效中心高级能源工程师，PE，LEED AP BD + C，BEMP朱利安·劳埃（Julianne Laue）对这些系统和一些最佳实践进行了概述。
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