The Cool Boss CB-28 and CB-36 portable evaporative air coolers cost-effectively help create a more comfortable and productive work environment in large shops. The biggest coolers in the Cool Boss lineup, they can drop the air temperature up to 26 degrees F using up to 70% less energy than conventional air conditioning. These feature-rich models include built-in air ionizers to clean the chilled air, Bluetooth players to improve the atmosphere, and powerful LED floodlights to brighten even the darkest bay. Durable swivel casters make it possible to move the coolers around the shop as needed.