In the Lobby of a Building
If the flag is hung inside a building lobby, it should hang vertically so that the canton is on the left side as seen from the entrance.
When there is more than one entrance, the canton should be hung vertically near the center of the lobby, with the canton on the north side when the entrances are on the east or west sides, or facing east when entrances are on the north or south sides. When there are entrances from more than two directions, the canton should hang facing east.