We are having a new A/C unit installed, and we are sliding it about 20 feet along the back of our house to get it out of the way. If we cut a new hole to run the lineset inside, it will run perpindicular to the joists (unfinished basement) for the twenty foot difference. I dont want to have to drop the ceiling any lower than it is when I finish the basement.
The contractor said we can just run it outside and through the existing hole in the wall. He says it doesn't lose efficiency, but I find this hard to believe when it will be sitting outside in the hot sun all day. Is he correct? Pros and cons for either method?