在恒定气流条件下测试了31种不同空气过滤器的样品，这些样品代表了一般通风中使用的过滤器的设计和效率范围。在这些过滤器上进行了ASHRAE标准52.1的完整系列测试，加上粒度效率测试和测试，以测量在受到超清洁气流时过滤器中灰尘的再吸入。除模拟VAV流量外，相同过滤器的其他样品随后接受相同的测试阵列。使用恒定流量和VAV流量的结果之间没有显著差异； 然而，在这两种情况下，低效过滤器确实表现出了实质性的再培训。对过滤介质阻力的进一步研究表明，如果考虑气流作用下的介质压缩，从介质几何形状可以比现有理论更准确地预测作为介质气流速度函数的介质阻力。给出了总过滤阻力随过滤流量变化的表达式及其系数的计算方法。单位:双引文:ASHRAE交易，第106卷，第。2.

Samples of 31 different air filters, representative of the designs and efficiency range of those used in general ventilation, were tested at constant airflow. The complete array of ASHRAE Standard 52.1 tests was run on these filters, plus particle-size efficiency tests and tests measuring the reentrainment of dust from the filters when subjected to ultra-clean air flow. Additional samples of the same filters were then subjected to the same test array, except that VAV flow was simulated. No significant difference was noted between the results using constant flow and VAV flow; low efficiency filters did, however, show substantial reentrainment for both cases. Additional studies of the filter media resistance showed that media resistance as a function of media airflow velocity can be predicted from media geometry more accurately than by existing theories if media compression under airflow is taken into account. Expressions for overall filter resistance as a function of filter flow and means for obtaining their coefficients are given.Units: Dual