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The Negative Air Machine AQ-V-4A uses a vacuum effect generated via the negative air pressure to stop the spread of pollutants like dusts and molds. This model is built with aluminum parts for heavy-duty use and comes with stair climbers for increased portability. In addition to a 2,500 cubic feet per minute motor, this unit has three stages of filtration: cube, pleated and true 99.97 percent HEPA. This is separate from the motor for easier access and maintenance.
