At Keystone, your familys comfort starts here. Keystone’s budget-friendly heat/cool 230V window/wall air conditioner is designed with a removable chassis so you can install it either in a window or through an exterior wall. Our two-in-one installation marvel includes an adjustable window kit for convenient window installation. For wall installation, you can use an existing compatible wall sleeve or purchase one separately. Wall sleeve not included with unit. In addition to cooling, this versatile unit also offers supplemental heat capability, providing you with an additional heat source to your main heat source when outdoor temperatures are above 23 degrees Fahrenheit. This mode is supplemental and NOT meant as a primary heat source. This unit requires a special 230-volt/20-amp electrical outlet and will not operate with a standard 115V household electrical outlet. It is packed with money-saving features including energy saver mode, sleep mode and a programmable 24-hour timer. Add the convenience of our easy-to-use Follow Me LCD remote control, and everyone can relax in blissful comfort.