Understanding Positive vs. Negative Pressurization

Positive vs Negative
Operating room and protective isolation = Positive
Airborne isolation = Negative

Room Pressurization

When the total CFM from supply air (1&2) > than the return air (3), the room is under positive pressure and the air will flow out of the room.

When the CFM from the return air (3) > than the supply air (1&2), the room is under negative pressure and the air will flow into the room

Compliance Home

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The hospital manages risks associated with its utility systems.
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The hospital maintains the integrity of the means of egress.
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The hospital establishes and maintains a safe, functional environment.
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