The Copeland RST45C1E-CAA-901 Compressor is a dependable 115V refrigeration compressor with a 4,250 BTU capacity, designed to provide efficient refrigerant compression for reliable cooling performance. It works by compressing low-pressure refrigerant vapor into a high-pressure, high-temperature state, enabling effective heat transfer through the refrigeration cycle. Commonly used in c... https://www.partshnc.com/copeland-rst45c1e-caa-901-compressor