Stainless steel not conducting heat would be an advantage for linesets - you don't really want the heat/cold to be released in the lineset... it's released in t

Stainless steel not conducting heat would be an advantage for linesets - you don't really want the heat/cold to be released in the lineset... it's released in the condenser/evap coils. Those coils are already often made out of aluminum, so dissimilar metals aren't really an issue as far as I can tell...