I have two crank out casement aluminum framed windows with single glass panes. Would trade for a new room humidifier. A 1/2" mounting flange around it. No screens available, but there are provisions to secure them after a shop has them made. A piece of glass or Lexan in each one needs replacing. Approximately 48" high and 16.25" wide are the pane dimensions.. Make a reasonable offer, picked up, please.