Yes, portable air conditioners typically require water to operate properly, but it is not for cooling purposes. Portable air conditioners use a process called condensation to remove humidity from the air. They have an exhaust hose that vents hot air and moisture outside the room, but they also have a water collection tank or tray that collects the condensed moisture.
This water collection tank needs to be emptied periodically to prevent overflow. Some portable air conditioners may have a continuous drainage option, allowing you to connect a hose to the unit to drain the water directly, eliminating the need to empty the tank manually.
It's important to follow the manufacturer's instructions regarding water management for your specific portable air conditioner model. This ensures efficient operation and prevents any issues related to excessive moisture accumulation.