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