I guess this might be an example where leapfrogging technology by being a bit late ends up with better results? One reason split units are popular in southern Europe is precisely because they&#x27;re cheaper to install than wall units, since you only have to drill a small hole through the wall, not open up a big gap. But I can see that if you already opened up a big gap, because you installed A&#x2F;C back when the ductless split units weren&#x27;t widely available, then it&#x27;d be more expensive to close it back up again. A&#x2F;C has only really gotten common in Italy, Greece, and Spain since the &#x27;90s or so, so they went straight to the modern split units when retrofitting.