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3. Ventilation Control
3.1 Ventilation System Requirement
The main function of the ventilation system is to blow in the fresh air and blow out the waste air as
shown in the below drawing
y The room is provided with exhausted gas blower and fresh air blower
y The flow sensor control the blowing in and out operation
y Over pressure is permitted at no time.
y The fresh blower will run only if the flow monitor senses that the exhausted gas
blower works properly.
y If any irregularity takes place on air in blower and air out blower, the warning lamp
will light.
The control circuit for the traditional ventilation system is shown below:
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