ok, i am getting conflicting reports from three different contractors.
i am having a ductless mini-split type air conditioner installed upstairs in my daughters room.
one guy told me they hook it up and thats it, turn it on, good to go.
another guy tells me they pressureize the system, and then its good,
the third guy tells me THEY put a vaccum on it and then it is good.
i dont really care what is the right way, but somebody or two somebodies are lying to me.
help me sniff this out