At Keystone, your familys comfort starts here. Keystone offers a full assortment of budget-friendly portable air conditioners for any room in the house. Portable air conditioners give you the freedom to choose what room to cool and when to cool it. A reliable solution to cooling a room without central AC, they are also great for reducing your central AC use by cooling the room you use the most. Plus, this model offers supplemental heat for those in-between days with chilly nights. Supplemental Heating mode is meant to be operated when temperatures outside are between 41 and 80 degrees. This mode is supplemental and NOT meant as a primary heat source. With easy-to-use features such as our convenient Follow Me remote control, you and your family can relax in blissful comfort. All our portable AC models include caster wheels for easy movement and complete window venting kits for quick setup.