Heat or cool multiple rooms with a single self-contained, through-the-wall unit that can be concealed in a wall or closet. Vertical packaged air conditioners are compact, all-in-one units with a built-in compressor, so there's no need for external wiring, refrigerant lines, or landscape barriers. Install them in a cutout of an exterior wall and control them with a remote, wall-mounted thermostat. They have a fully insulated cabinet for quiet operation. Often used in hotels, multi-unit buildings, and room additions.