All I can add is that I have a split system for AC only in my sewing area and it's great! It cools the entire room and has been wonderful. We put it in about 6 years ago when they were almost unheard of and not much of a selection. Now they have gained popularity and a good selection is available. My regrets about the system are that we should have bought the unit that supports 2 inside AC's and should have got one that heats too.