Specifications

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MIL-STD-1472E
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ENCLOSURE VOLUME (m31PERSON)
FIGURE39. VentUatIon requfrement$
NBC conditions, ventilation requirements shall be mod~led as
required. Ventilationor other
protectivemeasuresshall be providedto k~p g- Vawrs,d~~ ~d fire= wi~ he p-~ible
ExposureLimitsspedled by 29 CFR 1910and thelimitsspecifiedin theAnerican Conference of
GovernmentalIndustrialHygienistsThresholdLid
Values. Intakes for ventilation systems shall be
located to minimke
the
introductionof contaminatedairfromsuchsourcesas exhaustpipes. (See
5.12.6.2 for vehicle ventilation provisions.)
5.8.1.3 Air conditioni~.
The eff=tive temperatureor Cm within personnelenclosures
utilizedfor detail work duxingextendedperiodsshallbebe notgreaterthan29.5°C (85°F) (see
Fiiure 38).
Cold-air shall not be direcily discharged on persoanel.
5.8.1.4 ~. Approximately45%relativehumidityshouldbe providedat 21°C(70°F).
TM valueshould decreasewithrising temperatures,butshouldremain above 15percent to prevent
irritationand drying of bodytissues,e.g., eyes,skin,andrespiratorytract (see Figure 40).
5.8.1.5 Temmmture uniformity.
The temperatureof theairat floorlevel and at head level at
any personnel
position should notdiffer bymorethan5.5T (lO°F).
5.8.L6 ~
.
Whenspecialprotective clothingor personal
equipment,includingfull and artialpressuresui& fuelhandlersuits, bodyarmor, arctic clothin
&
/!
andtern rature regulatedC1Oing are requiredandworn,a comfortmicro-climatebetween 20°
W;gmR..m ,.,,,,“,,,
..... ..... ..
g TTien!
whliv v@6r P?&W’t?WIU3ST (9S’F),3 MMH~ WiBIeiilwatkrvapor
presstueis desirableand,wherepossible,
shall be maintainedbyheat transfersystems.
5.8.1.7 Thermal toleranceand comfortzones
Temperature
and humidityexposure should not
exceedthe elTW!We
tet’hpmd!? Wi’t!tsgt’wnIn‘Flfjm?4’WWhencOrreetedfbr MrWoclty (F!gtm 39).
5.8.1,8 [.imit~(i thermal trdertmce zones. Wherehard physicalwork is to he required for more
than
two hours, an environment not exceeding a wet bulbglobetemperatureor wetdry index of
2X (77”F)w b pRwi4eJ, W&n@WwU’
T
*W &Nbg &y&@&&(a U
evaporationof
sweat from the skin)is require ,
tins indexshallbe decreased 5°C (lO°F) for
complete chcmicxd protccx.ivcui~ifomls, 4DC[?°F)forimcrmcdiatcclotiing systems, and 3“C [S’’I:I
t’mk! y
firmer.