• To remove odours
• Where there is overcrowding in a room
• Where there is lack of natural ventilation or where it is inadequate
• Where there is high heat or moisture gain from outside
• Where there are heat generating processes within a room e.g. in a kitchen
• To remove poisonous fumes
• Where there are steam generating processes within a room.
Titany answered the question on October 14, 2021 at 09:31
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