hopper lite

Definitions

Construction

  • A bottom-hinged, inward-opening window sash which allows air to pass above it when open.
  • A side-hinged, inward opening window sash which, when open, allows most of the passing air over its top, but also allows the passage of some air through a narrow opening along its bottom.
http://www.dictionarycentral.com/definition/hopper-lite.html