UFC 3-410-04N
25 October 2004
Figure 3-5. Exhaust and vacuum system schematic diagram
3-5.7.11
Install a prefilter and a HEPA filter in front of the blower to prevent it from
becoming contaminated.
3-5.7.12
Design the vacuum system duct to balance with the exhaust system duct
where the two systems connect.
3-5.7.13
Use manufacturer guidance to design vacuum system and TM 5-805-4 as
preliminary guidance.
3-5.8
Replacement Air. Design replacement air systems with fan inlet guide
vanes, variable speed motors, or "eddy current clutch" units to maintain a pressure
(relative to the atmosphere) ranging from 12.4 to 24.9 Pa scale (-0.02 to -0.05 inches
watergage (wg)) in the shop spaces.
a. Maintain the pressure in decontamination areas, the equipment room,
and dirty locker rooms within a range of -2.49 to -9.96 Pa (-0.01 to -0.04
inches wg). Maintain the pressure in clean spaces within a range of +4.98
to +12.4 Pa (+0.02 to +0.05 inches wg). For further replacement air
system criteria, see paragraph 2-4.5.
b.
See paragraph 2-4.5 for further details.
3-5.8.1
according to MIL-HDBK-1003/3.
3-7
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