本推荐规程（RP）涵盖了单向流清洁空气装置的定义、性能评估程序和主要要求。RP可用于定义客户和供应商之间关于单向流清洁空气装置（带独立电机鼓风机）和带可更换过滤器的动力终端装置的规范、采购和认证测试的协议基础。本文件还提出了在客户指导下对客户拥有的设备进行重新认证的建议。

This Recommended Practice (RP) covers definitions, procedures for evaluating performance, and major require-ments of unidirectional-flow, clean-air devices. The RP may be used to define a basis of agreement between cus-tomer and supplier in the specification, procurement, and certification testing of unidirectional-flow, clean-air devices with self-contained motor-blower(s) and powered terminal units with replaceable filters. This document also presents recommendations for recertification of devices owned by the customer, under direction of the customer.