One wall-mounted unit can sometimes influence nearby open-plan areas, but it is not a reliable way to cool several separate rooms with doors, corridors and different heat loads. Air follows the easiest path, so a comfortable living room does not guarantee that a closed bedroom elsewhere will reach the same temperature.
For multiple separate rooms, individual indoor units or a properly designed multi-split arrangement may provide better control. The right solution depends on how the spaces connect and which rooms actually need cooling or heating.
Doherty's Glasgow air-conditioning service can assess whether a single unit is realistic or whether separate room treatment would give better results. Avoid oversizing one unit in the hope that it will push air through an entire house.
