Cool Room Air With Fan By The Window

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SUMMARY

Positioning a fan to blow air out of a window effectively cools a room by enhancing air movement, which accelerates the evaporation of sweat and reduces humidity levels. This method creates a pressure differential that facilitates the influx of cooler air from outside, even when outdoor temperatures are higher. The cooling effect is primarily due to increased airflow rather than a significant drop in room temperature.

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  • Understanding of basic thermodynamics and heat transfer principles
  • Knowledge of airflow dynamics and pressure differentials
  • Familiarity with humidity and its effects on comfort
  • Experience with fan operation and placement strategies
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  • Research the principles of thermodynamics related to heat transfer
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NotMrX
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Suppose a fan was positioned to blow air out of a window so that window fit well around the fan. Why would this cool off a room?
 
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How is air coming into the room?

What if the temperature in the room were 70 degrees F and the temperature outdoors 100?
 
I don't know. I just know that when I put a fan in that way the room cools off. It is an efficiency so maybe air isn't coming and the pressure is lowering?
 
NotMrX said:
I don't know. I just know that when I put a fan in that way the room cools off. It is an efficiency so maybe air isn't coming and the pressure is lowering?
I would imagine the cooling effect you are experiencing simply comes from the fact that the air is moving, preventing build up a humid air thus allowing your sweat to evaporate at an increased rate.
 

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