AAON RQ series rooftop units (2 to 6 tons) are engineered for performance, flexibility, and serviceability. RQ units are available as air-cooled or water-cooled condenser packaged rooftop units, air-source, water-source, or geothermal heat pumps, 100% outside air units, and chilled water or non-compressorized air handlers. Heating is available in high performance hot water, steam, electric, and gas heating configurations. Options include high efficiency variable speed fans and variable capacity compressors, energy recovery wheels, and economizers with efficiencies up to 19 SEER.