Retrotec FanTestic Integrity (Venting Calculator) - Manual (Page 17)

rev-2014-10-27
Page 17 of 29
©Retrotec Inc. 2012
“Continuous Mixing” – Agent is discharged at near-ceiling level into the enclosure. Fans circulate gas
throughout the room, resulting in a uniform agent concentration. This concentration begins at Initial
Concentration and reduces until it eventually reaches the specified Minimum Concentration. The time it
takes for the Initial Concentration to reach the Minimum Concentration is defined as the “hold time”.
2.1 Choose the extinguishing agent
The list of extinguishing agents will depend on the choices in the venting equation and enclosure
leakage standard drop downs.

“Agent”
Select which agent is used for the enclosure’s fire suppression system.
Figure 3: Available extinguishing agents for NFPA2001 with FSSA