The hot air is at the higher place. Does negative pressure fan also need to be installed at a higher place?
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The optimal height of installing negative pressure fan is 1-3 meters above the height of human body to generate the wind flow that causes convection, and the human inside can feel the wind. If the fan is installed at the highest place, the air will flow directly to the high place, so the people below will not feel the air low (or wind), and the cooling effect will be greatly reduced. In the case of eliminating dust or odor, the fans must be installed at the highest place to avoid its influences to the staff.
