Abstract
For most of their lives engineers have used one or another version of the 'crack method' to analyze infiltration. They know its limitations. In many applications, it's grossly and obviously in error. For many industrial problems it's simply not relevant. Infiltration is a result of the interaction of a number of variables. The crack method is based only on wind pressure and the size of the opening. It works as long as the other variables are in a 'normal' relationship with each other. When the variables deviate from the norm, substantial errors occur.
Kennon, M. K. (1982). Industrial Infiltration. Energy Systems Laboratory (http://esl.tamu.edu); Texas A&M University (http://www.tamu.edu). Available electronically from
https : / /hdl .handle .net /1969 .1 /94271.