The Cool Boss CB-28HV Desert Storm Series is the most powerful model of evaporative cooler in the Cool Boss line, states the company, and it comes equipped with a 28" axial-flow fan with an effective cooling area of 3,915 sq. ft. Designed without a drive belt, it produces less vibration and noise while delivering a smooth, consistent performance. The cooler also features a built-in wireless Bluetooth speaker system and a 4,000 lm LED floodlight, as well as a touchpad and remote control with auto-time shutoff.