As of 2015, the price of a portable swamp cooler, or portable evaporative cooler, at Lowe's ranges from $140 to $1,083. The price of a cooler varies based on factors that include brand, features and cubic foot per minute cooling capacity
Lowe's sells swamp coolers by Honeywell, KuulAire, UltraCool and MasterCool. The least expensive unit offered by Lowe's is the Honeywell Direct Portable Evaporative Cooler that cools 150 cubic feet per minute and is designed for use in rooms of up to 100 square feet. The most expensive unit, the MasterCool Direct Portable Evaporative Cooler, cools air at up to 1,600 cubic feet per minute, cooling spaces of up to 800 square feet.