Writing in HPAC Engineering, engineer Dave Moser describes a recent project where he was summoned to the principal’s office — and it wasn’t for poor behavior. The principal felt cold, despite the space temperature reading right at 70 degrees. After some head scratching, Moser discovered the issue: “The principal was feeling cold because of the cold surface temperature of the wall.” In the article, he explains why it’s important to know the difference between operative temperature and air temperature.

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