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Chapter 22
Relative Humidity

Excerpt

Heat exchanger engineers are sometimes asked what can be done to control the relative humidity (RH) in rooms where air is known to be too moist or too dry. In these situations a rule of thumb has been developed that can be beneficial in defining the problem and when quick answers are needed. The rule was developed using the known data that follows.

A/C units are designed for room air to pass through the evaporator and be cooled 20°F give or take a few degrees. Consider this example. The saturated pressure of steam in atmospheric air at 80°F is 0.50744 psia.

  • 22.1 Parked Trailer Operating Condition
  • 22.2 Auditorium

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