The technicians installed a 14.3 SEER2 AC with Single Stage Furnace. We made sure everything was level and up to code in our area. We also air sealed everything with mastic and adjusted the refrigerant charge to ensure proper operation. We also changed a supply run out from 6 to 8 inch, and upsized the guest bedroom from 4 to 6 inch. Everything is working great and we started the heat and ensured proper operation with that as well.