通风效率是指通风系统向乘客提供新鲜空气、稀释和清除内部产生的污染物的效率。在ASHRAE标准62.2中，其定义为输送至空间的室外空气中到达占用区域的部分。然而，标准62.2不包含有关如何评估和测量系统通风效率的实用信息。本研究评估了污染物去除效率指数在测量机械通风动物建筑通风效率中的适用性。在冬季和夏季，在机械通风的断奶仔猪内的多个位置测量了总悬浮颗粒物（TSP）质量和氨（NH3）体积浓度的空间分布。 实验结果表明，由于建筑物内的气流模式不同，污染物在不同季节的空间梯度也不同。因此，为了对建筑物内的平均污染物浓度进行更有意义的估计，取样器必须在冬季横向分布，夏季纵向分布在建筑物内。结果还表明，室内样本数量会影响计算的通风效率。必须在建筑物内获得至少六个forTSP样本和九个NH3样本，以便对具有类似配置和尺寸的aswine建筑物的通风效率进行更有意义的估计。引文:ASHRAE交易——第120卷，第一部分，纽约州纽约

Ventilation effectiveness refers to the efficiency of a ventilation system in providing fresh air to occupants and to dilute and remove internally generated contaminants. In ASHRAE Standard 62.2, it is defined as the fraction of outdoor air delivered to the space that reaches the occupied zone. Standard 62.2, however, does not contain practical information on how to evaluate and measure the ventilation effectiveness of the system. This research evaluated the applicability of contaminant removal effectiveness index in measuring the ventilation effectiveness of a mechanically ventilated animal building. The spatial distribution of total suspended particulate matter (TSP) mass and ammonia (NH3) volumetric concentrations were measured at multiple locations inside a mechanically ventilated wean-to-finish swine building during winter and summer seasons. Results of experiments showed that the spatial gradient of pollutants differed between the seasons due to different airflow patterns in the building. Consequently, in order to obtain a more meaningful estimate of the average pollutant concentrations in the building, the samplers must be spread out crosswise during winter and lengthwise within the building during summer. Results also showed that the number of samples indoors affected the calculated ventilation effectiveness. At least six samples forTSP and nine for NH3 must be obtained inside the building to obtain more meaningful estimates of the ventilation effectiveness of aswine building with similar configuration and size.