1â thick blended media guard bed. â« 6â thick deep-bed ASZM/TEDA carbon media bed. 6â thick deep bed blended media bed. â« 6â thick deep-bed blended ...
Shelter In Place: Update and Shelter-In-Place: Applications Chris Muller T h i l Services Technical S i Manager M Purafil, Inc. ASHRAE Annual Meeting – Denver, Colorado Seminar 11 - Protection Strategies for ChemBio Building Security: Strengths and Weaknesses Sunday, June 26, 2005
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ASHRAE Sa Sayss . . . “…[gas [gas phase] air cleaners may decrease the vulnerability of the building against gas-phase environmental challenges.” g “The design for ultimate protection . . . . is a very costly option. option ” “Heightened efficiency can be attained costeffectively with . . . MERV 13 through 16 filters . . . and solid bed commercial grade air cleaners.” ASHRAE. (2003). “Risk Management Guidance for Health, Safety, and Environmental Security under Extraordinary Incidents.” Atlanta, GA: American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc.
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U S A m CoE Sa U.S. Army Sayss . . . Because most facilities are not designed to accommodate sophisticated filtration systems, the US Armyy Corps p of Engineers g has recommended that Shelters in Place (SIP) be designated for individuals to assemble in the event of a biological or chemical attack. “Recirculation filter units can be employed to increase the protection achieved by sheltering in place.” U.S. Army Corps of Engineers. (2001). “Protecting Buildings and their Occupants from Airborne Hazards.” TI 853-01. Washington, DC: U.S. Army Corp of Engineers.
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Cost of P Protection otection C i Continuous Positive P i i Pressure P CP
$M’s
Stand-By Positive Pressure CP $K’s
Ambient Pressure CP Enhanced SIP
$100’s
SIP Evacuation L Low
CP – Collective Protection
M di Medium
Hi h High 4
Enhanced SIP An SIP unit MUST utilize both particulate and chemical filtration for the most complete protection against p g CB agents. g Traditional particulate filters are ineffective at removing CB agents agents. A (minimum) 99.97% efficient HEPA filter is
designed to remove biological agents, but is i ff ti against ineffective i t chemical h i l agents. t
To remove chemical agents, systems must contain t i a NATO NATO-approved d impregnated i t d carbon. b 5
Enhanced SIP (2) To protect the function of the ASZM-TEDA carbon, a “guard bed” of caustic-impregnated activated carbon/activated / alumina media and potassium permanganate-impregnated activated alumina should be placed upstream to remove acidic gases specifically, and other reactive gases in general.
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SIP Filte stem Components Filter S System Prefilter section
Includes HEPA Filtration (min. 99.97%)
Chemical filter section #1
Contains caustic impregnated carbon/alumina + permanganate-impregnated p g p g activated alumina.
Variable--speed direct Variable direct--drive blower section Chemical filter section #2
Contains NATO-approved ASZM-TEDA carbon.
Final filter section
Minimum MERV 14-15 (85% ASHRAE).
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Residential SIP S stem System Private residence in high-rise apartment building building.
NYC penthouse - protected area of 5,000 ft2.
SIP system consists of 3 stages of chemical filtration media, pre- and post particulate filtration.
1” thick blended media guard bed. 6” thick deep-bed ASZM/TEDA carbon media bed. 6” thick deep-bed deep bed blended media bed. bed
Variable-speed blower for air balancing and pressurization i ti requirements. i t 8
Residential SIP S stem (2) System Compact size allowed system to be placed in closet.
1000 cfm vertical side-access filtration unit. Integrated into existing HVAC system.
Designed g to run 24/7/365. / /
Ancillary benefits for 2 asthmatic children. Quarterly checks of “guard bed” media and timely replacement l t intended i t d d to t provide id ASZM-TEDA ASZM TEDA carbon life of 3±years.
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Fo eign Cons late SIP S stem Foreign Consulate System Room in center of renovated building to be used for collective protection SIP only.
Size: 20x12x10’ Replaced drop ceiling (tiles) with hard ceiling. Entire room sealed. Able to hold pressure of 1 1-2” 2” about ambient. ambient Wall penetrations. Magnetically sealed doors. Two supply grills retrofitted with self-sealing
backdraft dampers rated at 1000 fpm.
Cutoff switch for HVAC system triggers triggers. emergency generator for SIP filter system. 10
Fo eign Cons late SIP S stem (2) Foreign Consulate System Small air volume to be filtered. filtered
