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What is PPV?
 Protecting your personnel from hazardous environments
is vital. Effectively ventilating toxic gases and smoke from fires,
as well as harmful dust, fumes and other contaminates in industrial
applications, will make your work environment safer.
Two ventilation techniques are most effective for achieving
this goal: Positive Pressure Ventilation (PPV) and Negative Pressure
Ventilation (NPV). PPV has changed firefighting worldwide and is increasingly
popular in industrial applications. First adopted in the U.S.A., it
has become a standard technique in Europe and Asia, replacing the use
of NPV.
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