Retrotec FanTestic Integrity (Venting Calculator) - Manual (Page 24)

rev-2014-10-27
Page 24 of 29
©Retrotec Inc. 2012
2.3.4 Case of Halocarbon gas extinguishing agents with VdS:
Adjustments in VdS equations are made using temperature in the calculation of pressure relief vent
area, so only temperature is available to be entered.
2.3.5 Case of gaseous CO2 extinguishing agent with NFPA12:
Adjustments are made using temperature in the calculation of pressure relief vent area, so only
temperature is available to be entered.
2.4 Enter enclosure details

“Maximum flooded volume”
Calculate and enter the enclosure volume that is to be flooded with agent.

“Maximum flooded height”
Enter the maximum flooded height, which is the height of the installed nozzles for the agent
discharge.

“Lower leakage fraction”
Enter a value between 0.15 and 0.5 which represents how much of the leakage occurs in the
lower part of the room versus the total enclosure leakage. The default of 0.5 is the most
conservative value.