如今，人们对室内空气质量的兴趣大幅增加，而且普遍缺乏有关通风效率对室内空气质量影响的信息，这激发了人们对通风效率的兴趣。制定了一项新标准，以定义测量换气效率的示踪气体程序。标准129，测量换气效率的标准方法，定义了两种示踪气体试验程序:示踪气体升压试验程序和示踪气体衰变程序。标准129进一步定义了三种采样方法:自动线采样；抓取采样；综合袋式取样。RP-891的目标如下:1.）获取有关测量程序实用性的信息，并获得可用于改进ASHRAE标准1292未来版本的建议。 )当使用标准129草案中规定的测量程序时，量化换气效率测量值的精度。

Today there is an increased interest in ventilation effectiveness being stimulated by the tremendous increase in the interest of indoor air quality and the general lack of information regarding the impact of ventilation effectiveness upon indoor air quality.A new standard was developed to define tracer gas procedures for measuring air change effectiveness. Standard 129,Standard Method of Measuring Air Change Effectiveness, defines two tracer gas test procedures: tracer gas step up test procedure and tracer gas decay procedure. Standard 129 further defines three sampling methods: automated line sampling; grab sampling; integrated bag sampling.RP-891 was undertaken with these objectives:1.) to obtain information on the practicality of the measurement procedures and to obtain recommendations that can be used to improve future versions of ASHRAE Standard 1292.) to quantify the precision of measured values of air change effectiveness, when the measurement procedures specified in the draft of Standard 129 are utilized.