5. Answer briefly III

 

NoYes, I would likenot like to buy a house having windows but no ventilators.

 

The warm air is always lighterheavier than the cold air. When the warm air goes downwarm air risescold air rises from ventilators, a lowerhigher air pressure space is created. Eventually, the warmercolder air that surrounds the area rushes into that space and fills it up.