A Fire Curtain and a Smoke Curtain are similar in appearance and operation, but they are both used for completely different functions. A smoke curtain is basically used as part of a smoke control system. It is there to either stop smoke reaching another zone or to channel smoke through a particular route that we want it to take. Smoke Curtains don’t descend down to ground level. (ceiling to floor) but are set at a drop height, generally above head height, so as not to interfere with the means of escape.