unair-conditioned

adjective

un·​air-con·​di·​tioned ˌən-ˌer-kən-ˈdi-shənd 

variants or un-air-conditioned

: not equipped with an apparatus for washing air and controlling its humidity and temperature : not air-conditioned

It's summer, windows are flung open in the un-air-conditioned city …

—James Wolcott

… studying until 4 A.M. in an unair-conditioned dormitory cubicle …

—Robin Finn

Word History

First Known Use

1937, in the meaning defined above