更好地控制渗透损失为大量节能提供了机会。TheASHRAE手册:基础卷介绍了两种估算渗透的方法。根据每个房间的总窗户数和总空气门数进行估算。基于门窗周围裂缝流量测量的裂缝法考虑了裂缝大小和天气影响。针对加利福尼亚州和明尼苏达州的试验室，将示踪气体测量与换气法和裂缝法的计算结果进行了比较。该协议适用于确定设备尺寸，但不适用于评估室内污染问题。引文:研讨会，ASHRAE交易，第86卷，第2部分，科罗拉多州丹佛

Better control of infiltration losses offers an opportunity for substantial energy savings. TheASHRAE Handbook: Fundamentals Volumepresents two methods for estimating infiltration. The air change method is a gross estimate based on the number of windows and doors in each room. The crack method based on measurements of flow through the cracks around windows and doors accounts for crack size and the effect of weather.Comparisons of tracer gas measurements with calculations by both the air change and crack methods are presented for test houses in California and Minnesota. Agreement is adequate for sizing equipment but not for assessing indoor pollution problems.