WANAI air conditioner is equipped with three modes: cooling, drying and fan. It is capable of cooling a space of 250sq.ft. The built-in automatic evaporation system is able to maintain a certain level of humidity in the room. There are two fan modes, high speed and low speed, so you can adjust the mode according to your situation. Built-in timer and sleep mode can save you energy and money as well as create a good sleeping environment. Three In One Comfort: WANAI 8000 BTU ASHRAE Portable Air-conditioner Cooling has to help your house,apartment,or room be as comfortable as possible. It can cool up to 250 Sq Ft, circulate air with its 2-speed fan, or reduce humidity utilizing the dehumidifier mode.