Asked by Scott

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

Answers

Answered by Ms. Sue
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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