I have learned that, to publicize the miracle, the Chanukah candles must be within 20 amot of the ground. Yet when I was in Jerusalem during Chanukah some years ago, I saw chanukiyot in windows of upper floors in buildings, leading me to wonder how people with upper-story apartments (or hotel rooms, for travelers) are supposed to fulfill the mitzvah. This question about eating out during Chanukah suggests that publicizing the miracle to the members of one's family "counts"; is that correct?
If lighting on an upper floor of a building fulfills the mitzvah, does this also apply to temporary residences, like a hotel room, or only to one's permanent home? Must a traveler during Chanukah ensure that he gets a first-floor hotel room? (Perhaps we are more willing to tell a traveler to do this than to tell a resident to move house.)
(This question arises out of the same consideration as this one.)