Checked over upstairs system ,checked all electrical components and connections,verified condensation drain operations ,verified refrigerant charge and overall operations ,found dirty air delivery and distribution systems and no air scrubber present . Checked over downstairs system ,checked all electrical components and connections,verified condensation drain operations ,verified refrigerant charge and overall operations ,found dirty air delivery and distribution systems Presented options and customer chose air scrubber install on upstairs system ,installed air scrubber on supply and wired ,checked operations and returned to service.