A：Common air curtain is vertical type for blowing from top to bottom, thus, before setup of (Vertical ) air curtain, factors like indoor and outdoor differential pressure, wind speed, blowing angle, location and height should be reviewed; however, almost all air curtain contractors dismiss above factors, except noise and aesthetic appearance in setting up air curtain for isolation of contamination, such case are much likely to cause side effect:「Capture more dirty air to flow into clean room」. The essential solution is to ①increase differential pressure in clean room; ② set up dual doors; and ③ establish buffer area.
★There is a kind of domestically rare「horizontal air curtain」, of which air outlet is located in the left side, air inlet is located in right side, the air inlet and air outlet of air curtain result in good isolation effect.