I like the device a lot! Turns my workspace from hell to heaven. It really works for the purposes it made - portable air cooler for a small space. This unit is not an air conditioner and does not have a compressor or condenser inside. Evaporative coolers are designed for spot cooling and will not lower a room's ambient temperature. This unit is best used in dry climates or open spaces. For the best performance, you need to keep a window or door open to limit the rise of humidity and for better ventilation. Also as an advice add ice to the tank and set the unit near you.