在专用室外空气系统（DOAS）的设计中过度使用安全系数可能会导致严重的过度通风和超过必要的设备。然而，设计决策通常基于不完整的信息和假设，这些信息和假设可能有效，也可能无效，因此安全系数是设计工程师的重要工具。本文讨论了DOA设计中安全系数的几种常见用途，并就如何设计具有“备用容量”的系统以适应意外负载和增加气流或除湿容量的需要，同时将对安装成本和能源使用的影响降至最低提出了建议。 单位:双引文:ASHRAE交易，第115卷，第。2、路易斯维尔2009

Excessive use of safety factors in the design of a dedicated outdoor-air system (DOAS) can result in significant over-ventilation and larger-than-necessary equipment. However, design decisions are often based on incomplete information and assumptions that may or may not be valid, so safety factors are important tools for the design engineer. This paper discusses several of the common uses of safety factors in the design of a DOAS, and provides recommendations on how to design a system with "reserve capacity" to accommodate unexpected loads and the need for increased airflow or dehumidification capacity, while minimizing the impact on installed cost and energy use.Units: Dual