ISO 14857:2014规定了在各种压差下确定建筑材料的透气性，然后在75 Pa的参考压差率(Δ P)下指定透气性的设备和程序。 该方法旨在使用1m × 1m样本尺寸独立于基底测试材料。该测试方法的结果可用于确定材料是否有资格用作空气阻隔材料。

ISO 14857:2014 specifies the equipment and procedures to determine the air permeance of building materials at various pressure differentials and then assigning an air permeance rate at a reference pressure differential rate (ΔP) of 75 Pa. This method is intended for testing materials independent of a substrate using a 1 m × 1 m specimen size. The results of this test method can be used to determine whether a material qualifies to function as an air barrier material.