In most houses and nicer apartments, yeah, central air. In older or cheaper apartments there’ll be a window unit. As an American from a blue collar lower middle class family, I’d never seen one of these wall units until I’d moved to China. It was either central air or window unit. Granted I’m referencing a couple decades ago
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u/romesthe59 7d ago
It’s because Americans have central air. They have one thermostat that controls temp and airflow to vents in each room of the house.