For this super tune-up I inspected both units furnace and condensers. All equipment was measuring up with a manufacturer specs and running well. With the customers having 4 in box filters, I do recommend the AprilAire upgrade kit, for better dust capture unless wear on equipment overtime. Additionally both UV lamps were out therefore I recommend replacing those bulbs if they feel like they're beneficial to them, as well as installing compressor savers on both condensers to lower the amperage on startup. Lastly I do recommend home surge protection as they have both units and this will protect any damage during lightning strikes or major power surges.