right now, air conditioner includes both the internal side (post #4397367), and the external side (post #5015375). in the part of where i live, 95% of the time, if someone mentions AC, it always refer to the one inside. There's condenser_unit tag with only one post. the wiki of air conditioner also says that it is something that is in the building. then again, if we search for "External Air Conditioner" gives a lot of result too. we also can search it with air_conditioner -indoors. so should we separate them?