52.2 ADD G-2016

Method of Testing General Ventilation Air-Cleaning Devices for Removal Efficiency by Particle Size

52.2 ADD G-2016 发布历史

FOREWORD Due to the frequent practice of prefiltering@ filters are often used in two-stage systems. Because the first filter removes some of the particles from the airstream@ the downstream filter sees fewer large particles and a greater percentage of smaller particles. This results in a different performance for the downstream (final) filter than would be expected based on loading with the same dust as the prefilter. Thus@ an optional test method has been developed to allow standard testing for two-stage systems. Note: In this addendum@ changes to the current standard are indicated in the text by underlining (for additions) and (for deletions) unless the instructions specifically mention some other means of indicating the changes.

52.2 ADD G-2016由ASHRAE - American Society of Heating@ Refrigerating and Air-Conditioning Engineers@ Inc. 发布于 2016-12-30，并于 2017-03-03 实施。

52.2 ADD G-2016的历代版本如下：

• 2016年12月30日 52.2 ADD G-2016

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标准号

52.2 ADD G-2016

发布日期

2016年12月30日

实施日期

2017年03月03日

废止日期

无

中国标准分类号

/

国际标准分类号

/

发布单位

ASHRAE - American Society of Heating@ Refrigerating and Air-Conditioning Engineers@ Inc.

引用标准

6

适用范围

FOREWORD Due to the frequent practice of prefiltering@ filters are often used in two-stage systems. Because the first filter removes some of the particles from the airstream@ the downstream filter sees fewer large particles and a greater percentage of smaller particles. This results in a different performance for the downstream (final) filter than would be expected based on loading with the same dust as the prefilter. Thus@ an optional test method has been developed to allow standard testing for two-stage systems. Note: In this addendum@ changes to the current standard are indicated in the text by underlining (for additions) and (for deletions) unless the instructions specifically mention some other means of indicating the changes.