ACHX-D – Helios Air Cooled Screw Chiller (HFO Chiller) Cooling Capacity from 93 RT to 248 RT (329kW to 875kW) The ACHX-D features: High Efficiency Horizontal Screw Compressor Advanced Microprocessor Controller Twin Compressors with Independent Circuits All Aluminum Micro-Channel Condenser coil AHRI Certified and meets/ exceeds ASHRAE 90.1 standard Green Refrigerants