3-2 September 2004
ENVIRO-55 Engineered Fire Suppression System
38-KFSARG-000
Argonite systems designed to concentrations below 42.5% (corresponding to an oxygen
concentration of 12% or higher, sea level equivalent of oxygen) shall be permitted, given
means are provided to limit exposure to no longer than 5 minutes.
Systems designed to concentrations between 42.5 and 52% (corresponding to between 12 and
10% oxygen, sea level equivalent of oxygen) shall be permitted, given means are provided to
limit exposure to no longer than 3 minutes.
Systems designed to concentrations between 52 and 61.7% (corresponding to between 10 and
8% oxygen, sea level equivalent of oxygen) shall be permitted, given the following:
The space is normally unoccupied.
Where personnel could possibly be exposed, means are provided to limit the exposure to
less than 30 seconds
Systems designed to concentrations above 61.7% (corresponding to 8% oxygen or below, sea
level equivalent of oxygen), shall only be used in unoccupied areas where personnel are not
exposed to such oxygen depletion.
Exposure beyond the stated limits may result in personal injury or death.
3-4 RELEASE TIME
Industrial
NFPA 2001 recommends 95% of the design quantity of Argonite be released within 60
seconds.
Other countries/authorities may have different requirements than those mentioned above, and
therefore must be consulted.
3-5 TEMPERATURE CONSIDERATIONS
During a discharge of the agent only, the temperature within the protected enclosure will drop
approximately 10°F to 20°F (5°C to 10°C). After the end of the discharge, the temperature will
rise again within approximately 2 to 3 minutes.
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