the.com/window unit

america's answer to central air: sweaty, loud, and jammed into a windowsill with a prayer.

means a self-contained air conditioner that sits in a window frame, cooling one room by dumping hot air straight back outside.

from grew out of early 20th-century room coolers; willis carrier invented modern ac in 1902, but the compact window model exploded in american homes and apartments after ww2, when landlords wanted cheap cooling without ductwork.

for instance

nyc apartment acvisible from the street in nearly every pre-war building facade

friedman coolersindustry staple brand since 1957, still dominant in u.s. window units

dorm room unitoften banned by colleges, smuggled in anyway every august

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