Retrotec DM32 User Manual
Page 86
Page 86 of 94
©Retrotec Inc. 2014
In the tables, the Pressure of Interest is 50Pa, and Assumed n is 0.65 or 0.60
The actual flow exponent n for an enclosure can be calculated by measuring building leakage at multiple
pressure differences, from 10 to 50 Pa, and determining the slope of the line:
Flow = C ×𝑃𝑟𝑒𝑠𝑠𝑢𝑟𝑒
𝑛
The graph of pressure versus flow will be linear if graphed on a log-log scale, and the slope will be n.