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Re: Windows fogging up! Cause? 200 1988

posted by  someone claiming to be Don Foster on  Mon Dec 11 12:56 CST 2000 [RELATED]

Randy --

"Any ideas on what might be the cause of this?"

Sure — it's simple thermodynamics. It's raining out, so the humidity is high. You brought water into the car and raised the temperature, evaporating more moisture—the RH is near 100% inside the car, and because it's warmer the dew point is higher than the outside dry bulb temperature. The result is abundant condensation on anything slightly cooler than the inside temp (such as the windshield).

The answer, as Mr. Bain said, is to vent some moisture-laden air outside. Open a window.



Don Foster (near Cape Cod, MA)





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New Windows fogging up! Cause? [200][1988]
posted by  someone claiming to be Randy Starkie  on Mon Dec 11 12:34 CST 2000 >


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