→Which Is the Right Side?
===Which Is the Right Side?===
# The criteria by which one can determine which side the mezuzah should be used are as follows:
## '''Entry''': The mezuzah should be put up on the doorpost which is to one's right upon one's entering the house. <ref> Gemara Menachot 33b, Rambam Hilchot Mezuzah 6:12, Shulchan Aruch 289:2, Taz 289:3, Levush 289:2, Aruch Hashulchan 289:5, Kitzur Shulchan Aruch 11:3, Kitzur Shulchan Aruch of Rav Mordechai Eliyahu 11:3. </ref> This criteria applies equally to the outer doors of the house to the rooms inside the house.<ref>Igrot Moshe YD 4:43:4</ref>
## '''Usage''': If a room has two doorways if one of the two rooms that it connects is used more frequently then the mezuzah should be put up on the right side going into the room that is used more frequently.<ref>
* The Levush 289:3 writes that the side rooms of a house which open to the main room which was warm in the winter should have a mezuzah going into the main room since it is used more than the side room. This rule trumps the direction of the door. This is accepted by the Shach 289:6 who comments that it is obvious. The Kitzur Shulchan Aruch 11:4, Chayei Adam 15:18, Chelkat Yakov YD 161, [http://www.yutorah.org/sidebar/lecture.cfm/788640/rabbi-hershel-schachter/the-laws-of-mezuzah/ Rav Hershel Schachter in “The Laws of Mezuzah” (min 34-42)], Igrot Moshe 4:43:4 and Hamezuzah Vehilchoteha 11:11 agree.
## '''Majority of Walking''': If the position isn't determined by entry or by which is used more frequently it can be determined by which room people walk from one room to another; if majority of the times people enter in one direction the mezuzah is placed on the right of that direction.<ref>[http://www.yutorah.org/sidebar/lecture.cfm/788640/rabbi-hershel-schachter/the-laws-of-mezuzah/ Rav Hershel Schachter in “The Laws of Mezuzah” (min 34-42)] holds that the factor of looking at the majority of the way people walk one room to another trumps the rule of the way the door is placed. Aruch Hashulchan 289:8 and Igrot Moshe YD 1:176 agree. Hamezuzah Vehilchoteha 11:12 holds that this factor is to be used after the door rule. Chelkat Yakov YD 161 agrees.</ref>
## '''Doorway''': If the position of the mezuzah cannot be determined based on which direction is used for entry or which room is used more frequently it can be determined by the door. Since the door generally swings into the room (besides the outermost door of the house) the way the door swings can be considered the way one enters the room and the mezuzah is placed on the right side entering the room.<ref>Menachot 33a, Shulchan Aruch YD 289:3, Aruch Hashulchan 289:6</ref> However, if the mezuzah is determined based on the previous factors it doesn't matter which way the door swings.<ref>Mordechai cited by Bet Yosef YD 289, Shach 289:6, Aruch Hashulchan 289:7, Igrot Moshe YD 4:43:3, Hamezuzah Vehilchoteha 11:11</ref>
# Other factors include:
## '''Walking Route''': Generally, the route by which a person walks around their house should be consecutively entering one room to another creating a circuit. For example, if the door of the house leads exclusively to room A which leads to room B and on to room C then the mezuzot should be placed on the right side of the door entering the house from the outside to A to B to C. However, this rule isn't ironclad, rather the first two rules are definitive.<ref>Igrot Moshe YD 4:43:4</ref>