Cool Boss CB-12SL Portable Evaporative Air Cooler

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When you're busy planning your work or activity schedule, the one thing you can't plan on is how hot it might be. We can help you with that. With the portable Cool Boss CB-12, you can transform hot and stuffy to cool and breezy. The very compact Cool Boss CB-12 does this by reducing the temperature as much as 26 degrees.

The portable Cool Boss CB-12 makes its cooling magic by providing an endless supply of evaporatively cooled air to a directed area. Simply position the portable Cool Boss CB-12 to your selected area, add and maintain the 15-gallon water reservoir, plug in-to 110V electrical, and turn on the unit. The process works with evaporative cooling as water is pumped to the top of the Honeycool™ cooling pad. Then as the water cycles down, a portion of the water evaporates across the pad, and a cooling effect occurs.

A 12” diameter Blue Flex™ axial-flow fan powered by a 1/3 HP motor propels the cooled air outward to the directed area. Select any level of cool air volume you wish from three fan-speed settings up to 1,600 rpm. The portable space-saving CB-12 features automatic swing-louvers that oscillate to sweep a wide cooling area, expanding the cooling coverage to as large as 770 square feet. It’s a small cooler that packs a big area-cooling punch.

The portable Cool Boss CB-12 is easy to move around your shop or venue because it is fitted with 4” easy-roll locking swivel casters and operates on common 110-Volt power. Its compact size combined with durable High-Density Polyethylene (HDPE) construction allows you to haul it from one place to another. Featuring a manageable 73-lb. weight, and a trim 8” x 4” x 22” size, it allows it to be easily transported (with water drained of course) in a variety of mid-to-large-size passenger vehicles.

The Cool Boss CB-12 is a simple and affordable cooling solution for the outside patio, pool deck, and all sorts of work or sports areas with matching size-matched spaces. The portable Cool Boss CB-12 is easy to setup and affordable to run, making it the perfect space-saving cooler.


  • Oscillating auto-swing louvers
  • Blue Flex™ axial-flow fan
  • Automatic water source shutoff
  • Durable ABS plastic shell construction
  • Honeycool™ evaporative media
  • 15-gallon reservoir
  • Protective cover comes standard
  • User-friendly controls
  • Extra-long power cord
  • Space-saving design
  • 3-speed fan
  • Antibacterial housing
  • GFCI plug
  • Durable swivel casters
  • UL® certified


Stackable No
Fan Diameter 12" (305 mm)
Fan Speeds 3-Speeds
RPM (variable) 1,725
Max. Airflow 1,850 CFM
Style Auto-Swing Louvers
Capacity 15 Gal (57 L)
Consumption 0.5 - 0.75 Gal/Hr
Cooling Area 770 sq. ft.
Standard Power** 110V / 60 Hz / 1 Ph
Cord Length (feet) 15
Sound Level (decibel) 69 - 79
Controls Control Panel 
Media Dimensions (ea.) 22" (H) x 8" (W) x 4" (D)
Media Panels (per unit) 3
Unit Dimensions 22" x 27" x 45"
Unit Weight (lbs.) 73
Shipping Dimensions  
Shipping Weight (lbs.)

**Optional power 208-230V / 50-60 Hz / 1 Ph

Cool Boss evaporative air coolers offer an energy-efficient cooling option when the air is hot with low humidity, such as in drier climates or wherever humidity levels are at 60% or less for maximum efficiency.

*All specifications mentioned are under random test conditions. Actual performance depends on surrounding environment and ambient air conditions. Specifications may vary in different countries and climates and are subject to change without prior notice. Water Capacity is the total volume of water that can be contained within the air cooler water reservoir and water distribution system.

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