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Lobby,Railway waiting area Type
① Cigarette smoke is elevated and sucked into the ceiling (C) by its own heat and the inhaling power of the ventilator.
② Inhaled smoke is purified by the multi-layer two-stage electrostatic dust collector. Then the purified air exits from (B) and forms the 'air curtain' that thoroughly divides the inside from the outside area. (Airflow velocity: 1m/sec at one meter above the ground).
③ About 20% of the purified air make exit outside the smoking area (A) maintaining the inside in a negatively pressured (2mmAq) condition; keeping smoke from spreading out.