Both MS's we have installed are heat pumps . For that reason , both the lines are insulated , as vwhead77 said .
If you are going to pre-run anything , do not forget about electrical .
If you pre-install PVC for the lines , 2" may or may not work . If you do try it , be sure to use long radius electrical PVC conduit 90's . If you use 2" 90's like tou would on plumbing , it is not going to work for the lines .
This ;
https://www.lowes.com/pd/CARLON-2-in...itting/3129167
Not this ;
https://www.lowes.com/pd/LASCO-2-in-...-Elbow/3307898
I am cheap . I used white metal rain gutter downspout & fittings to hide the lines . Plus , it is readily available .
https://www.lowes.com/pd/Amerimax-2-...nspout/1005187
Wyr
God bless