York International offers packaged air-cooled and water-cooled, direct expansion (DX) chillers. Air-cooled chillers are offered with a scroll compressor from 10 to 130 tons and variable speed rotary screw compressors from 150 to 500 tons. Scroll compressor chillers (Model YCAL) are furnished with HFC-407c refrigerant and rotary screw compressor chillers while another (Model YCAV) is provided with HFC-134a refrigerant. The YCAV Latitude chiller provides unmatched performance with respect to energy efficiency, rating as 22% more efficient than competitive models. York water-cooled DX chillers offer mechanical refrigeration with twin rotary screw compressors and HFC-407c refrigerant from 90 to 210 tons.