Performed maintenance on Nordyne system installed in 2015 for previous homeowners. Client has been in the home six years. Cleared drain line. Air filter good at this time. Roof unit operating well with good electrical components and refrigerant levels. Biological growth development inside blower compartment of indoor unit and heavily contaminated inside supply ductwork going into the condo. Recommended to client on having a Pure Air X UVC system installed which he opted to move forward with for the discounted price of 900. Paid with Amex. Job complete.