Portable air conditioners are compact cooling units designed to be easily moved from one room to another. They work by drawing in warm air, cooling it, and then releasing the cooled air back into the room. These units typically require a window for venting hot air, making them a convenient option for spaces without central air conditioning. These air conditioners come in various sizes and cooling capacities, making them suitable for different room sizes. They often include features like adjustable thermostats, timers, and remote controls for added convenience. Popular brands include Honeywell and Black+Decker, known for their reliability and performance.