This doesn&#x27;t explain NYC, where a huge number of apartments use window units.  Landlords don&#x27;t feel compelled to provide A&#x2F;C, so tenants need to provide their own, but tenants aren&#x27;t allowed to drill any holes at all, so they&#x27;re left with window units.  Plus, window units are cheap as chips in NYC--under $200.<p>In any case, almost nobody in NYC uses the sort of split system so common everywhere else.  Older buildings are left with window units, while new buildings have built-in units, often with the most horrible control panels you can imagine from some dudes in New Jersey.