LESSON 4
VENTILATION
Section I. VENTILATION SYSTEMS
4-1.
GENERAL
a. Industrial operations of some kind will be found on virtually all Army
installations. Many of these operations generate toxic substances, dust, and heat which
can be harmful to the worker if they are inhaled or which can cause severe worker
discomfort. To prevent this from happening, various types of ventilation systems have
been designed and are used to protect the worker and to create a safe, comfortable
working environment. An understanding of ventilation systems will help you to evaluate
their effectiveness in eliminating the health hazards associated with industrial
operations.
b. Ventilation is probably one of the most important control techniques, which
can be employed to improve or maintain the quality of the air in the work area for
administrative or industrial operations. Generally speaking, ventilation is a way of
controlling the environment with airflow. In industrial work areas, the purpose of airflow
is to achieve one or more of these aims:
(1)
(2)
Removing a contaminant,
(3)
Diluting the concentration of a contaminant, or
(4)
Supplying makeup air.
c. All applications of ventilation usually fall into one of these three areas:
(1)
Prevention of fire and explosions,
(2)
(3)
Control of heat and humidity for comfort.
4-2.
METHODS OF VENTILATION
a. Two Methods. Two different methods of ventilation can be employed to
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4-2