A reheat coil in HVAC systems increases the temperature of dehumidified air, which decreases relative humidity. This function helps maintain comfort and prevents air from freezing. The correct answer to the student's question is that it decreases relative humidity by increasing air temperature. ;
The reheat coil in HVAC systems increases the temperature of dehumidified air, which decreases relative humidity. This feature is crucial for maintaining comfort and preventing air from freezing. Therefore, the correct answer is option D: decrease the relative humidity by increasing the air temperature.
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