Retrotec FanTestic Integrity (Venting Calculator) - Manual (Page 23)

rev-2014-10-27
Page 23 of 29
©Retrotec Inc. 2012
2.2.5 Case of gaseous CO2 extinguishing agent with NFPA12:
Uses a peak mass flow rate for the calculation of pressure relief vent area, which is defaulted to a value
consistent with experiments.
2.3 Enter enclosure conditions during hold time
Enter the minimum anticipated temperature that the enclosure could experience during a discharge.
Enter the minimum and maximum relative humidity in %, in cases where it is necessary as outlined in
the next sections:
2.3.1 Case of Inert gas extinguishing agents with FSSA:
Adjustments are made using temperature in the calculation of pressure relief vent area, so only
temperature is available to be entered.
2.3.2 Case of Halocarbon gas extinguishing agents with FSSA and FIA:
Adjustments are made using temperature and relative humidity in the calculation of pressure relief vent
area, so all are available to be entered.
2.3.3 Case of Inert gas extinguishing agents with VdS and FIA:
Adjustments are made using temperature in the calculation of pressure relief vent area, so only
temperature is available to be entered.