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AVI (Intake)
Our intake vents are designed with a larger free area ratio to reduce the velocities of the air flow at the point of intake. This lower velocity insures moisture and debris does not enter into the airstream within the vent. In all instances the free area is at least twice the throat area and in smaller units the free area is greater than three times the free area.
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AVR (Relief)
Our relief vents are sized to insure the free area surrounding the throat is at least equal to the throat square footage and in the case of smaller units, the free area is twice the square footage of the throat area.
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