At Keystone, your family’s comfort starts here. Designed for a room up to 700 square feet, Keystone's budget-friendly 15,100 BTU 115V 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 of ours separately. This Energy Star model 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 cool, blissful comfort.