Sometimes it is difficult to open an exterior door of a buildingbecause the air
Chapter 2, Problem 2.90(choose chapter or problem)
Sometimes it is difficult to open an exterior door of a buildingbecause the air distribution system maintains a pressure differencebetween the inside and outside of the building. Estimate howbig this pressure difference can be if it is not too difficult for anaverage person to open the door.
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