The Trane COM10470 3.5-Ton Reciprocating Compressor is a replacement compressor designed for compatible Trane HVAC systems. It uses a reciprocating piston mechanism to compress low-pressure refrigerant vapor into high-pressure vapor, supporting continuous refrigerant circulation through the cooling cycle. This compressor is used in compatible air conditioners, heat pumps, and packaged... https://www.partshnc.com/trane-com10470-3-5-ton-reciprocating-compressor-gp423-hh1-jb