Which type of dehumidifier is most efficient in air at 85 F with 65% RH?

The correct answer is the refrigerant dehumidifier. This type of dehumidifier operates by cooling the air, which causes moisture to condense onto coils, allowing water to be collected and removed from the air. At a temperature of 85°F with a relative humidity of 65%, a refrigerant dehumidifier can effectively lower the humidity level by utilizing the principles of condensation.

Refrigerant dehumidifiers tend to be particularly efficient in warm, humid conditions, as they can maintain a balance of temperature and moisture removal. Their design allows for the quick processing of large volumes of air, making them ideal for environments with high humidity levels at elevated temperatures.

In contrast, other types like desiccant dehumidifiers are generally more effective in cooler temperatures and lower humidity conditions. They extract moisture through adsorption, which can be less effective in the specific scenario presented, where a refrigerant option would excel. Hybrid dehumidifiers combine both technologies but may not consistently outperform dedicated refrigerant units in the range described. Portable units may vary in technology, but they often do not reach the efficiency levels of a dedicated refrigerant unit under the same conditions.

Thus, for the given temperature and humidity, a refrigerant dehumidifier stands out as the