The three types of cooling towers are wet cooling towers, dry cooling towers, and hybrid wet-dry cooling towers. Wet cooling towers use water to absorb excess heat from your building and place that water into direct contact with the cool air that passes through the cooling tower through its ventilation systems. Dry cooling towers utilize heat transfer and do not come into direct contact with the ambient air. Hybrid wet-dry cooling towers use both wet cooling and dry cooling principles to efficiently control your building’s climate while using less water.