Abstract: A window mounted air conditioning unit is disclosed. The A/C includes an indoor unit, an outdoor unit, and a bridge. The indoor unit and outdoor unit are operatively connected by a line set (electrical wiring, refrigerant piping, condensate drainage piping, communication wiring, etc.) that is flexible and extensible and that resides in the bridge. The bridge is extendable from a first position to a second position to accommodate window openings of varying thicknesses. The A/C appliance is mounted to a separate mounting bracket that is itself extendable for varying width openings. The outdoor unit is pivotally connected to the bridge so that the outdoor unit can assume a first orientation during installation through a window opening, and a second orientation after passing through the window opening.