The LG LW1814ER Energy Star 18,000 BTU 230V window-mounted air conditioner is perfect for cooling a room up to 800 square feet. You will cool a lot and save even more with this unit's energy saver function, 24-hour on/off timer and a 11.2 Energy Efficiency Ratio. With its stylish full-function remote control, you can even get your cool on from across the room. Plus, LG's patented Gold Fin anti-corrosion coating provides a protective shield so the unit lasts longer. This unit requires a special 230V electrical outlet and will not operate with a standard 115V household electrical outlet.