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CBRN ProtectionBuildings, in and of themselves, offer only passive or short-term protection against the external release of toxic chemicals. Regardless of whether released outside or inside, the building's HVAC system will eventually draw the toxic elements into the building creating a dangerous if not fatal environment within minutes. Shutting down the building's HVAC system will slow the spread of the toxic elements through the building if done immediately. The act of shutting down the HVAC system and moving the occupants into an isolated room will afford limited, short-term protection. This action is referred to as shelter in place and it is not an effective means of protection against toxins which have entered the building through the internal release or drawn in through outside air intakes. Depending on the amount of toxic materials released, eventually every location within the building will become contaminated. The only effective protection is a collective protection system specifically designed to remove CBRN agents from the air supply.
Large building and multiple TFA protection: As an example of the performance and effectiveness of Hunter Homeland Security's line of FFA products, in the event of an outdoor release, a Hunter FFA Series system installed on a building's outdoor air intakes, will remove 99.999% of CBRN agents in either gaseous or vapor form and 99.97% (minimum) of biological agents in aerosol particles at an average of 0.3 microns. |
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