The MASTERCOOL® ducted evaporative cooler pulls hot, dry air through wet pads, converting the hot air into a cool breeze through evaporation. Environmentally friendly process uses tap water with no added chemicals and operates on less energy than condenser air conditioners. Provides indoor and outdoor cooling for most industrial, commercial, and residential settings. Rugged, rust- and corrosion-resistant, bolted design for smooth, quiet, long service. Louvers are easy to remove for service. Side discharge. Includes 115V pump. Single-speed, 115/230V. Unassembled.