The YORK YVAA air-cooled variable-speed screw chiller offers superior efficiency, reduced sound, and greater sustainability. The YVAA energy performance exceeds older chillers up to 50% and features a low kW/Ton for full-load design and off-design conditions. The unit offers design efficiencies up to 1.6 EER and delivers an integrated part load value (IPLV) as much as 19.8 EER. The chiller uses the environmentally-friendly HFC-134a refrigerant, eliminates the cooling tower, and features a falling-film evaporator and microchannel condenser coils.