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I will be happy to assist with whatever guidance you need.What questions do you have?
If you are going to run in wall, I would insulate both lines to prevent possibility of condensation issues. I would also attach a sheet of thin metal from stud to stud where they will run.This will prevent sheetrockers from hitting the copper lines.
What is model on indoor coil and outdoor unit? Are they "sweat" fittings that will need to be brazed?
You can come to site anytime you want.I am in and out.