The Amcor AL10000E portable air conditioner is designed to cool an average-sized room up to 300 sq. ft. This unit features a self-evaporating technology. During the cooling process, water is extracted from the air as it passes through the unit. Most of this water is used to cool the unit and make it run more efficiently. This unit has a built-in water tank (not removable) with a drain outlet. When the tank fills, the compressor stops running. This indicates that the tank should be emptied. Included with the unit is a window mounted exhaust kit. AC must be vented via exhaust hose and window kit (included) no permanent installation required. Uses a standard 115V electrical outlet. Warranty: 1 year parts and labor, 5 years on the compressor. Exchange only no refunds..