Cool Boss CB-28 Evaporative Air Cooler - Low VoltageThe CB 28 is a medium duty commercial grade cooler that is well suited for large industrial space cooling. When temperatures rise and youre looking for a cost effective cooling solution, look no further than Cool Boss. The CB 28 evaporative cooler puts out big air exactly what youd expect from the world leader in commercial grade cooling technology. Use it indoors or out and help turn summer to winter with just everyday tap water. Even though the CB