Science

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In the winter are you letting the cold air in or the warm air out when you open the door

  • Science -

    I wanted to answer "Yes." But BobPursley explained it to me this way:

    "No air can come in/out, without an equal volume coming out/in. You are letting HEAT out.

    "Cold is the absence of heat. So heat goes out, and absence of heat comes in."

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