American Safe Room ASR-200-AV-NBC Safe Cell Installatie- en bedieningshandleiding - Pagina 18

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Specifications — occupant ratings
The ASR-200-AV-NBC produces 120 cubic feet per minute (CFM) of filtered air supply sufficient for
24 adults. This 5.0 CFM per occupant is based on the first ASHRAE standard that is excerpted below.
The Israeli standard of 3.5 CFM per occupant is also useful in determining the absolute upper end of
your shelter occupant capacity.
In order to insure sufficient airflow rate and overpressure state in a particular installation the
guidelines specified in the installation manual and test kit must be followed.
Some installations require larger unit sizing based on the size and construction type of the room
rather than the number of occupants. Please do not hesitate to contact our technical support
department with any questions. We highly recommend adherence to local building codes.
ASHRAE Handbook 1985 Fundamentals Volume
Section IV Load and Energy Calculations
Chapter 22 Ventilation and Infiltration
(TC 4.3, Ventilation Requirements and Infiltration)
Page 22.1 Minimum Outdoor Air Supply Rates:
ASHRAE Ventilation Standard 62-1981,1 defines minimum outdoor air supply rates for various types
of occupancy. These rates have been arrived at through a consensus of experts working in the field.
As shown in Eq. (2), a minimum rate of 5 cubic feet minute per person for sedentary activity and
normal diet holds the Co
While normal healthy people tolerate 0.5% Co
submarines sometimes operate with 1% Co
factor for increased activity, unusual occupancy load or reduced ventilation.
ASHRAE HANDBOOK 1982 APPLICATIONS
Environmental Control for Survival 11.1-11.24
Page 11.4 Vitiation Factors:
Carbon dioxide concentration should not exceed 3% by volume and preferably should be maintained
below 0.5%. For a sedentary man, 3 cfm (1.4 l/s) per person of fresh air will maintain a Co
concentration of 0.5%.
level in a space 0.25% under steady state conditions.
2
in the atmosphere, a level of 0.25% provides a safety
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Installation and Operation Manual
without undesirable symptoms and nuclear
2
ASR-200-AV-NBC Safe Cell
Revision C - April 27, 2016
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