My installer is planning to place the AC condenser (Goodman SSX160601) on a concrete pad behind the house. To connect it to the coil in the attic, the lineset would require a 30 ft rise, and then about 40 ft across the attic.
I wondered about the 70 ft length of the lineset, and he said that as an alternate, he can put the condenser on the garage roof, which would result in a 12 ft rise and 10 ft in the attic. But this would require building a support structure on the roof, which he seems reluctant to do. It would also be very visible from the backyard, which I don't like too much.
Should I be concerned with the long lineset and go for roof mounting, or should I go with the original plan? Are there any special steps he needs to take for the long lineset (he mentioned using 1 1/8" line, a hard start capacitor, and crankcase heater)?