You want to buy a house. Would you like to buy a house having windows but no ventilators? Explain your answer

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cbse-class-7-science
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#1

You want to buy a house. Would you like to buy a house having windows but no ventilators? Explain your answer.
Answer:
A house having windows but no ventilators should not be bought. This is because warm air being lighter than cold air, rises up. This warm air can go out of the house mostly through ventilators. If there are no ventilators, then the warm air cannot go out easily.