Using an existing Desert Aire R-22 remote condenser with a Desert Aire replacement R-410A dehumidifier is strictly dependent upon which model of Desert Aire remote condenser you're currently utilizing. If the existing remote condenser cannot be used, a new one must be purchased from Desert Aire. The following is a list of all Desert Aire basic remote outdoor condenser models and indicates whether they're compatible with one of our R-410A systems. Model RC: No. Model ROC: No. Model ROCF: Yes. Model ROCH: Yes. Model ROCQ: Yes. Please note that the R-22 systems use different refrigeration oil than R-410A and therefore all traces of oil and R-22 refrigerant must be removed prior to conversion to R-410A.