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it depends mainly on it's use. Bigger windows and doors makes way for more air to enter the room. If the air flow in that is region is high we might need only small windows and doors. This condition is applied in vice versia . This is also made according to some beliefs of particular people

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Everything on Earth is made up of tiny particles called molecules, which are in constant motion. When the molecules heat up, they move faster, pulling apart from one another. As they move apart, they take up more space, causing even solid objects to grow slightly larger. Molecules slow down as they cool, and they take up less room. This causes things to shrink a little bit.