Not to fan the flames in the other HVAC thread!
Can one upgrade the entire system/equipment from the SEER from 30 to 80 and not need to replace the line set (assuming it is in good condition)?
Walmart is redoing its stores. In the one I go to they are removing the tiles and applying a clear coating. But you can still see the tile lines. Kind of interesting. The down side is that rearranged the shelving so stuff is not where it used to be.