AAON LZ Series chillers and outdoor mechanical rooms are engineered for premium performance and superior serviceability.  Variable capacity compressors and high efficiency air-cooled or evaporative-cooled condensers are available to maximize performance.  All models feature double wall rigid polyurethane foam panel construction with walk-in service compartments that allow maximum accessibility when installing and maintaining the equipment.  LZ Series chillers can also be provided with factory engineered and installed pumping packages and factory installed boilers, eliminating the need for an indoor mechanical room.