The Goodman 13 SEER GSX13 operates at up to 13 SEER. The Goodman 13 SEER GSX13 may reduce annual cooling costs by hundreds of dollars for those who upgrade to this Goodman 13 SEER system. R-410A refrigerant is used with this Goodman 13 SEER system to replace R-22. R-410A used with the Goodman 13 SEER GSX13 does not sacrifice comfort provided by this Goodman 13 SEER system despite its Earth-friendly tag. The Goodman 13 SEER GSX13′s scroll compressor provides a quiet, smooth operation. Scroll compressors such as that used with this Goodman 13 SEER system operate in a circular motion instead of the piston-like operation of reciprocating compressors. This eliminates many of the moving parts found in the reciprocating compressor, helping to reduce the operation sound levels of the Goodman 13 SEER GSX13.