Some operations, such as hot
work, have specific ventilation requirements.
Dilution Ventilation
Figure 1: Compressed air powered air movers.
Dilution Ventilation can be
used to reduce concentrations of flammable and toxic
fumes, vapors, or particulates. Additionally, acceptable oxygen content can be achieved and
maintained by introducing outside air.
Figure 4: Electric non-ducted exhaust
ventilation.
Figure 5: Air movers providing general ventilation to confined spaces.
Exhaust ventilation can be used to remove flammable and toxic fumes, vapors,
and particulates from the space.
Where mechanical ventilation is
used in potentially flammable atmospheres,
this equipment must be rated as explosion proof by Nationally
Recognized Testing Labs (NRTL).
Make sure that supplied air is from a clean source and
that the hazardous atmosphere is exhausted to safe areas. Keep the ducts
as short and straight as possible for more efficient air movement.
The following are examples of exhaust ventilation
equipment:
Figure 1: Compressed air powered air movers.
