Fortochka
![A window with a fortochka (in the upper left corner)](/Images/godic/202501/14/Fortochka4314.jpg")
A Fortochka (Russian:фо́рточка;IPA: [ˈfortətɕkə]) is a small ventilation window. It usually spans the frame of one window pane and opens on hinges independently of the whole window. Fortochkas are in common use in Russia, other post-Soviet states (Ukrainian: кватирка, kvatyrka), and Finland (Finnish: tuuletusikkuna).