Negative Air is a technique where Air Scrubbers are used to create a “vacuum” or negative pressure inside of a containment area. “Containment Area” is where the mold has been contained to usually via thick plastic sheeting. This vacuum or negative pressure will: Constantly draw clean air into the containment area further preventing cross contamination. Control and direct air flow directly into the Air Scrubber capturing air born particles of mold, dust, etc.