Well.... "Sec. 2901.09. (B) For purposes of any section of the Revised Code that sets forth a criminal offense, a person who lawfully is in that person's residence has no duty to retreat before using force in self-defense, defense of another, or defense of that person's residence, and a person who lawfully is an occupant of that person's vehicle or who lawfully is an occupant in a vehicle owned by an immediate family member of the person has no duty to retreat before using force in self-defense or defense of another." Note that the above section does not remove a duty to retreat in a friend’s vehicle. It is important to understand that all of the above apply in your occupied home, temporary residence or vehicle, not in any other place. I would conclude that "temporary residence" is any place that I am staying at lawfully be it a friends home, hotel, etc.