what is the reason behind having ventilators near the ceilings
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Answer:
Ventilators are used to let hot air escape from the room. They are ideally placed near the ceiling because , hot air being lighter , rises upwards and escapes front he ventilator , therefore maintaining the room's temperature.
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The air we exhale out is warm. This warm air rises and leaves the room through ventilators.
To compensate the air loss fresh air enters trough doors and windows. Thus, ventilators helps in keeping the air fresh and cool.
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