Retrotec FanTestic Integrity (ISO) - Manual (Page 39)

rev-2014-10-27
Page 39 of 50
©Retrotec Inc. 2012
In the “Venting and Peak Pressure Analysis” section, there are 2 data sets that may be used to describe
the venting area available during hold time, as well as the “Leakage area for enclosure” which was
measured (or entered directly) in the “Hold time analysis- Total Enclosure Leakage” section and which is
displayed here again for convenience, with its value extrapolated to 125 Pa.
The enclosure must be configured to the same condition that it would be in during the venting period.
This means that if there is some means of pressure relief other than enclosure leakage (via the PRV
specified in the dropdown), it must be set to discharge mode. Once this is done, another door fan test is
run and this new leakage area is used for peak pressure calculations.
In some cases, the venting available with the chosen PRV will be different for a positive peak pressure
than a negative peak pressure, so a separate dataset is provided to enter venting information for each
direction.
For more detail on vent area testing and peak pressure analysis, please consider the Retrotec Level 2
Enclosure Integrity Training.
4.1 Choose equations to calculate peak pressure and minimum
leakage area required
The drop down on the right allows you to choose the set of equations that will be used to calculate the
peak pressure that will develop during discharge, and the minimum leakage area that will be required to
relieve that pressure.
If you choose NFPA12, FIA or VdS, please heed the following warnings: