Samsung Electronics DVM Series Technical Manual page 228

(4) Dealing with situations where the result exceeds the dangerous concentration level.
Where the installation of a facility results in a concentration in excess of the dangerous concentration
level then it may be necessary to revise the system design to some extent or else take one of the fol-
lowing courses of action:
<Action 1> Making openings which will allow the air to flow freely into the room.
Make openings above and below the door which are each equivalent in size to 0.15% or more
of the floor area or make a doorless opening.
<Action 2> Fit a mechanical ventilator linked to a gas leak detection alarm device.
Gas leak detection alarm device
Action 2
Mechanical ventilator
Indoor unit
Action 1
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Make openings sufficiently large
to permit a free flow of air