Specifications

MfL-Sill-1472E
5.8 Environment.
5.8.1 - ve-. and air
condititi.
5.8.1.1 u. Heating shall be provided within mobile personnel enclosures utid for
detail work or occupied during extended periods of time to maintain
interior dry bulb temperature
above 10°C (50°F). Within permanent and semi-permanent facilities, provisions shall be made to
maintain an effectivetemperature(ET) or corrected effective temperrttu.m(CEIl not & than 18*C
(65°F) (see Figure 38), unless dictated othenvise by workload or extremely heavy clothing. (See
5.12.6.1 for vehicle heating provisions.) Heating systems shall be designed such that hot air
discharge is not
directedon personnel.
%ltiop
NOTE: TO USE NOMOGRAPN DRAW $TRAIONT LINE OEIWEEN
:L g 4’%4,.
DRY U4LB TEMPERATURE (A) AND WET.8ULB TEMPERA-
TURE (EL EFFECTIVE TEMPERATURE IS INDICATED
.
WNERE TNtS STRAIGHT UNE CROSSESTNE
APPRDPRl-
a !?. s %+.
ATE VALUE FOR V~OCllY OF AIR (IN THIS EX.
u
AMPL& ET IS 20.6°C FOR OB OR 24.@C, WdB OF 16.B”c
i
AND AIR VELOCI~ OF 30.6 mpml
k
DRY - BULB TEMPERATURE -°C
●
m..
t
1
40
4s
L+
●(Use 6“ black globe temperature
for
C. E. T.)
L..
CONDITIONS
Clothfng: 0.6
CIO
‘“e “&
Activity:
Sedentary or 1~ght
muscular work
/’
‘qW
Heating :
Radiation or convection t
type, I.e. , warm air,
directsteam or bt
i
-’S?
water radiators, plenum I
systems, hot surfaces /
Or
Sunl ighto
Jy
/
,i
r
+1
o
d
lb
I
x
I
i
16
20
I
2s
30
35
40
45
WET - BULB TEMPERATURE -OC
FIGURE 38. Effective temperature (II.T.) or corrected effective temperature (C.E.T.)
5.8.1.2 ~. Adequate ventilation shall
bc assuxedby introducing fresh air into any
personnel enclosure, If the enclosurevolume is
4.25 ms (150ft3)or MS per person, a minimum of
0,85 ms (30 ftq) of ventilation air per minute shall be introducedinto theenclosure; approximaMy
two-thirds should be
outdoorair. For larger enclosures,the airsupply per person may be in
accordance with the curves in FQurc 39, Air shall be moved past pmonncl at
a velocity not more
than 60
m (200 ft) per minute, whe~ manualsor loosepapersare used, airspeed past these items
<I1;II]bl’ nltl rllI)r(I[~1:1~3(Im (!OOf[)
per minule-- -20rn (65 ft) per minute L{possible ~~lU prCC~*JdC
pages
in nianuals Irombeing turned by the air or papersfrom beingblown off work surfaces, 1him