What do you mean by ventilation?
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Answer:
The provision of fresh air to a room, building etc.
Explanation:
ventilation is the process by which clean air is intentionally provided to a space and stale air is removed
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Ventilation is the process by which 'clean' air (normally outdoor air) is intentionally provided to a space and stale air is removed. This may be accomplished by either natural or mechanical means.
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