进行了测试，以测量由绕线柔性风管和刚性金属板风管组成的正确安装的多分支风管系统的气流特性。如果柔性风管系统的尺寸未按照设计住宅风管系统所需的适用标准确定，则以测量的系统损失系数表示时，系统总压力损失惩罚高达44%。然而，在设计条件下，由适当尺寸的绕线柔性管道建造的典型住宅管道系统和由刚性钢管道建造的类似系统的压力损失差异可以忽略不计。引用:2018年德克萨斯州休斯顿年会，技术论文

Tests were performed to measure airflow characteristics of properly installed multibranch duct systems composed of wire-wound flexible ducts and rigid sheet metal ducts.When flexible duct systems were not sized per applicable standards required to design residential duct systems, the total system pressure loss penalty was as much as 44% when expressed in terms of the measured system loss coefficients. However, the difference in pressure loss for typical residential duct systems constructed from properly sized wire-wound flexible ducts and similar systems constructed from rigid steel ducts was negligible at design conditions.