Finished replacing failed 15-year-old Goodman with new American Standard 16 SEER system. Full day job! Old unit had catastrophic compressor failure. New installation includes properly sized return air drop, new thermostat, and secondary drain pan with wet switch for safety. Made minor repairs to ductwork while system was open. Calibrated system for optimal operation. Registered warranty for customer. All debris removed and area left spotless. System running beautifully - house cooling evenly now. Instructed homeowner on proper filter replacement schedule.