Uses significantly less electricity than an Air Conditioner in a room up to 175 sq. ft.;BEST for hot dry climates, where the air humidity is low .Evaporative coolers will not work in Portland or Springfield but should work in New Mexico.;Non-compressor system cools naturally, efficiently and inexpensively (300 CFM air flow);Used with open windows and doors, no permanent installation required;Detachable 2.6-gallon (21-pint) water tank with low water alarm