An air conditioning system for a high-rise building includes a condenser unit and a compressor separate from the condenser unit and in fluid communication with the condenser unit. The compressor is to be located at a floor of a high-rise building that is below a location of the condenser unit at a roof top of the high-rise building. The system may also include an oil separator to separate oil from a refrigerant. The oil separator is in a path of the refrigerant from the compressor to the condenser unit, where the oil separator is distal from the condenser unit and proximal to the compressor.