Besides cooling, how can dehumidification in air ducts also be accomplished?

The process of dehumidification in air ducts can indeed be effectively achieved through the use of water misting. This method introduces a fine spray of water into the airflow, where the water can evaporate and, in the process, absorb moisture from the air, resulting in drier air being circulated through the ducts. The evaporation process requires energy, which can help reduce the humidity levels. This technique can be particularly useful in environments where relative humidity needs to be controlled without significantly reducing the air temperature.

Other methods, while they can influence humidity levels, do not accomplish dehumidification in the same direct manner as water misting. Chemical absorbents tend to work better in closed systems where moisture can be captured and held, water misting works by actively replacing the moisture content with drier air. Increasing airflow could distribute air more effectively but does not directly remove moisture from the air. Similarly, heating the air can reduce relative humidity by increasing the air's capacity to hold moisture, but it does not actually remove water vapor from the air.