UFC 3-410-04N
25 October 2004
local activity environmental manager to determine the pollution control requirements for
the process.
2-4.5
Replacement Air. Replacement air is as important as exhaust air in
controlling industrial process contaminants. Properly designed replacement air will (1)
ensure that exhaust hoods have enough air to operate properly, (2) help to eliminate
cross-drafts through window and doors, (3) ensure proper operation of natural draft
stacks, (4) eliminate cold drafts on workers, and (5) eliminate excessive differential
pressure on doors and adjoining spaces. The method of distributing replacement air
and the quantity of replacement air are critical with respect to exhaust air. Design the
replacement air system in accordance with the decision tree shown in Figure 2-2.
2-5
Previous Page
