The air duct calculator, or "ductulator," is a commonly used tool for designing and installing duct systems. Unfortunately, many designers and technicians receive limited instructions on its correct use. This lack of instruction frequently results in duct systems that fail to perform as intended.It's typical to find that delivered airflow into a home is less than 65 percent of what's required. In addition to low airflow, common problems include: excessive total external static pressure (TESP), ongoing equipment problems, nagging discomfort, thermostat wars, costly callbacks, and increased warranty costs. Let's look at how four incorrect uses of an air duct calculator can contribute to these problems.
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机译：风管计算器或“导气管”是设计和安装风管系统的常用工具。不幸的是，许多设计人员和技术人员对其正确使用的指导有限。这种缺乏指令的情况经常导致管道系统无法按预期运行。 r n通常会发现，送入房屋的气流少于所需气流的65％。除了气流不足外，常见问题还包括：外部总静压（TESP）过高，设备持续问题，不适感，恒温器大战，昂贵的回拨以及增加的保修成本。让我们看一下空气导管计算器的四种不正确使用是如何导致这些问题的。
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