GSHA Services, LTD installed a new Carrier Performance 18 two-stage central air conditioner (model 26TPA848W003, 4 ton, up to 18 SEER2) with a matched Carrier CVAVA4821XMA cased evaporator coil for a homeowner in Lincolnshire, IL. Our Carrier-trained technicians removed the aging condenser, set the new Performance 18 unit on a level pad, installed the cased coil on the existing furnace, connected and pressure-tested the refrigerant lines, pulled a deep vacuum, and charged the system with Puron refrigerant to factory specifications before verifying airflow and temperature split. The two-stage scroll compressor runs on low stage most of the time for quieter operation, better humidity removal, and lower energy bills, then steps up to full capacity on the hottest days. Carrier backs the Performance series with a 10-year parts limited warranty when registered. GSHA Services, LTD provides air conditioning installation, AC replacement, and HVAC repair in Lincolnshire, Buffalo Grove, Vernon Hills, Deerfield, Riverwoods, Long Grove, Lake Forest, and throughout Lake County, IL.