Retrotec FanTestic Integrity (ISO) - Manual (Page 41)

rev-2014-10-27
Page 41 of 50
©Retrotec Inc. 2012
If the “Venting datasets express leakage area of:” drop down shows “vent only”, datasets contain data
which resulted from measuring or entering an estimate of the leakage area of the PRV itself. For
measuring the positive venting dataset, the vents would have been fixed in the position they would
assume under +125 Pa, and for the negative venting dataset, the vents would have been fixed in the
position they would assume under -125 Pa.
When any of the PRV types that provide venting only in the positive direction are chosen, only the
positive venting dataset is used, and leakage area for negative pressure relief is assumed to be the
“Total Enclosure Leakage”.
When any of the PRV types that provide venting only in the negative direction are chosen, only the
negative venting dataset is used, and leakage area for positive pressure relief is assumed to be the
“Total Enclosure Leakage”.