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Condensation occurs when moisture-laden warm air strikes a cold, dry surface, such as a basement wall or window. A similar thing happens with cold water passing through copper pipes. Fortunately, minor condensation issues can be reduced substantially with a few inexpensive precautions. Difficulty: Easy.
The relative humidity for an indoor environment should remain at most 60 percent; however, 50 or lower is ideal, according to HVAClean. Humidity levels higher than 60 cause mold to grow inside air ducts.Mold growth potentially leads to respiratory problems and allergies. Running a thermostat constantly in the On position is hard on cooling units. Freon gas cools the evaporator, but with a consistent flow of air the coils are unable to stay cool.umidity levels higher than 60 cause mold to grow inside air ducts. Mold growth potentially leads to respiratory problems and allergies. Running a thermostat constantly in the On position is hard on cooling units.