MIL-HDBK-1027/1B
3.17.3.3
Ventilation
a) There should be an exhaust duct leading from each
fireplace compartment with a separately operated motorized
floating point damper. These ducts should come together above
the compartment ceiling. The design capacity of exhaust fans
for each side of the structure should be based on the
simultaneous operation of fireplaces or 8686 L/s "air out." The
minimum ventilation should be 472 L/s per fireplace or 1416 L/s
for each side of the structure. For ventilation air per area,
see Table 14.
b) Artificial smoke, butylated triphenyl phosphate,
should be used in fireplaces and in the emergency egress
chamber.
c) Each entryway of the egress chamber should be
provided with 472 L/s of ventilation which should keep it under
negative pressure so that the smoke should not migrate to the
staging area. Exhaust grills should be located above the entry
and exit on the inside and should draw air from the staging area
through the doorway. Motorized dampers should be provided to
allow remote adjustment of the entryway ventilation rate. A
second fan should draw 472 L/s from each inner room of the
egress chamber. The inner room fan should be used to clear
stray smoke from inner rooms only after the exercise is
complete. The inner room fan should not be on while trying to
maintain 37.7 degrees C in the chamber. Interlock the fans to
the entryway doors so they cannot run with the doors closed.
The open door is the source of makeup air for the inner room
exhaust fan. Heating of the egress chamber to 43.3 degrees C
during training should be provided by the device contractor.
Normal building heating should be provided.
3.17.3.4 Air Conditioning. Electronic equipment in each
instructor's station is expected to add 1172 W to the air load.
The air conditioning to the electric room adjacent to the
instructor's station has an air conditioning load of 5860 W due
to the equipment. The normal occupancy for each of the three
rooms should be two people.
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