In Scottsdale, near East Laurel Lane and North 52nd Street performing a quality inspection on a newly installed 4 ton, 14 seer Amana gas package system. Customer had concerns with air flow. Opened registers in guest bedroom and kitchen. Ducting was not sealed at return correctly. Gas piping on roof poorly done. Installed new fittings and secured. Ran new drain line. Unit is working properly upon departure.