A packaged terminal air conditioner (PTAC) is a kind of self-contained heating and air conditioning system. It is commonly found in hotels, motels, senior housing facilities, hospitals, condominiums, apartment buildings, add-on rooms & sunrooms. Many PTACs are designed to be installed in a wall. They have vents and heat sinks both inside and outside. Different standard dimensions are found in the market including 42×16 inches, 36x15 inches, and 40x15 inches.