本文件建立了GPACD的分类系统，该GPACD使用受当地城市污染源和/或远距离污染污染的室外空气向普通通风系统供应单程室外空气。除ISO 16890-1处理的颗粒污染外，分类系统还用于帮助评估分子污染。 本文件规定了用于分类的四种参考污染物，即臭氧、二氧化硫、二氧化氮和甲苯，因为它们与预期用途相关。本文件进一步规定了为每种污染物分配的三个负荷等级，反映了用于应用的装置的典型性能范围。由于参考污染物和负荷水平的选择对于预期应用是特定的和独特的，因此不包括所有其他应用。 特别是，本文件不适用于再循环应用和/或处理室内源污染以及制药、微电子、核、国土安全和军事应用中的GPACD。

This document establishes a classification system for GPACDs supplying single pass outdoor air to general ventilation systems using outdoor air polluted by local urban sources and/or long-distance pollution. The classification system is intended to aid in assessing molecular contamination in addition to the particulate contamination dealt with by ISO 16890-1. This document specifies four reference pollutants, i.e. ozone, sulphur dioxide, nitrogen dioxide and toluene, used for the classification due to their relevance to the intended application. This document further specifies three duty levels that are assigned for each pollutant reflecting the typical performance range of devices intended for the application. Since selection of reference pollutants and duty levels are specific and unique to the intended application, all other applications are excluded. In particular, this document does not apply to GPACDs in recirculation applications and/or dealing with pollution from indoor sources as well as pharmaceutical, microelectronic, nuclear, homeland security and military applications.