If you have an existing duct system, there is a great chance conventional split central air conditioning can be added. You definitely should have a training HVAC technician evaluate your duct system, and do a proper room by room heat gain in order to ensure a properly designed system. If you do not have an existing duct system, great central air conditioning is still within reach with a ductless mini split system from Mitsubishi. These single or multi-zone systems only require a 3" lineset between the indoor and outdoor system. They come in either a single zone system, or are available with up to 8 indoor zones from a single outdoor unit.