Equipped with a 4.75-gallon tank, this powerful 240 CFM evaporative cooler from Perfect Aire can effectively cool spaces up to 250 square feet. Best used in dry, arid climates, the PEVP240 is an energy-efficient means to bringing cool comfort to areas where relative humidity is low. Featuring 3 fan speeds, a 7-hour programmable timer and wide-angle internal oscillation, the PEVP240 is perfect for sunrooms, porches, and other small to medium covered areas. Only need a fan? Use the fan-only function to bring cool air relief to any space.