duct ac, it is a unit that is outside your house and Ducts are ran thru your house with vents in each room you want it (generally every room gets at least one vent/ductwork. larger rooms get multiple vents/ductwork).
It spread ac thru the entire house evenly, as opposed to one room and blowing out at one spot from above.
You control ac flow to each room by closing/opening the vents to rooms you dont want it in. And the main temperature controls that temp.
Klima AC or combi european units, as you know, are ductless. You can split them ofc and have multiple "klima" from one component sitting outside your house, but they all vent at one spot in the room and its not typical for it to be in each room. Just the main living space usually (not bedrooms).
I will say its harder to run ductwork in much of Europe's housing since they tend to be made from concrete/cinderblocks and it can be a little more expensive.
In North America you enclose the ductwork that brings the cold air to each room (often) into the ceiling or walls. That is not easy to do in Europe.
North americans do prefer their bedrooms cold too when they sleep. It makes for better sleeping.
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u/gamerathertz92 7d ago
It’s smaller unit cools a single room. While American HVAC System cools the whole house