Performed HomeCare routine maintenance inspection on 5 month old Rheem system that operates for upper level and 11 y/o 2-zone Lennox system that operates for main and basement levels. Checked amp draws. Cleaned flame sensors. Cleared pressure switch tubings. Drain lines are clear. Apco Ultras are operational. iWave are operational. Replaced Model 413CBN media filters with Model 413 media filters to increase airflow with less restriction from carbon filtration. Noticed that ductwork for main and basement system is insufficient for system size. System is also single stage and should be 2-stage for zoning. Adjusted dampers to relieve some air pressure during operation. Condenser electrical components are good. Informed customer of all findings. Systems are currently working.