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Troubleshooting and Repairing Major Appliances, 3rd Edition by Eric Kleinert

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30
CHAPTER
Dehumidifiers
Dehumidifiers are household appliances that remove moisture (humidity) from an area. Humidity is defined as the amount of water vapor in the air and is measured in terms of relative humidity (RH %). The higher the RH percentage, the more water vapor in the air. The optimum relative humidity level in an area is generally considered to be between 30 percent and 50 percent. Humidity levels exceeding 50 percent with temperatures over 70 degrees Fahrenheit can be uncomfortable, unhealthy, and in most cases cause personal property damage. Anything above this range may promote bacteria growth or mold. In colder climates, during the heating season, humidity levels should be maintained between 30 percent and 40 percent to prevent ...

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