Which type of equipment is used for dehumidification?

Dehumidification is the process of reducing the level of humidity in the air. Refrigeration systems remove moisture from the air by cooling it to a temperature where water condenses, facilitating the separation of water vapor from the air. This method is commonly found in dehumidifiers and air conditioning units, which utilize a refrigeration cycle to achieve effective dehumidification. By cooling the air, the system allows the moisture to condense on cold surfaces, collecting the water for removal while circulating drier air back into the environment.

The other options serve different purposes. Ventilation fans primarily increase air circulation but do not specifically target humidity reduction. Air purifiers focus on removing airborne particles and contaminants, not humidity levels. Heat exchangers are designed to transfer heat between two or more fluids but do not function effectively for dehumidification since they do not actively remove moisture from the air. Thus, refrigeration stands out as the appropriate choice for effective dehumidification.