The YORK YVAA air-cooled variable-speed screw chiller was manufactured by Johnson Controls for efficiency, reduced sound, and sustainability. The chiller offers flexible energy consumption with efficiencies up to 11.6 EER and an option to configure an integrated part load value up to 19.8 EER. This chiller features low kW/ton at both full-load design and off-design conditions. SilentNight and sound attenuation options work with the programmable control to optimize for sound performance by load-limiting the chiller. This device uses a refrigerant with no ozone-depletion potential and no phase-out date, a falling-film evaporator, and a microchannel condenser coil to reduce refrigerant charge.