MIL-HDBK-1191
APPENDIX A
ARCHITECTURAL AND ENGINEERING DESIGN REQUIREMENT
LEGEND and NOTES
7.
HVAC (23 characters).
a.
BL.
Air Balance (2 characters)
+-
Room pressure to be positive or negative as required by
isolation mode of assoicated bedroom. See HVAC Note "E"
below. space as described below.
++
Room exhaust and/or return is 20% less than
supply.
+
Room exhaust and/or return is 10% less than
supply.
0
Room exhaust and/or return is equal to supply.
-
Room exhaust and/or return is 10% more than
supply.
--
Room exhaust and/or return is 20% more than
supply.
EX
Room totally exhausted without supply.
b.
AC.
Air Change (2 characters) is the minimum total
air changes per hour required to meet ventilation
requirements at design conditions. These rates
are considered the minimum required for normal
health and comfort consideration. Additional air
may be required for temperature, dilution, and
odor control, as well as air requirements for
such items as hoods, glove boxes, clean-air
stations, combustion equipment and dust
collectors.
c.
OA.
Outside Air (2 characters) is the minimum outside
air changes per hour required to meet ventilation
requirements at design conditions.
*
Asterisk indicates that ventilation is to be based on the
greater of 4 outdoor air changes or 15 CFM outdoor air per
person.
d.
TEMP.
Interior design temperature. First line is in
degrees Celsius (C), second line is in degrees Fahrenheit
(F), for heat gains calculations. When the only
temperature listed is for the summer condition,
this temperature will be used for year around
operation. When cooling is required during
winter, such as in interior zones, temperature
listed under summer conditions should be used.
SM.
Minimum design temperature (2 characters) for
summer months.
WN.
Maximum design temperature (2 characters) for
the space during heating season.
Apdx A-11
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