What should be done when a disagreement arises in a public
place (bus, classroom, etc.) as to whether a window should be kept open or closed? Is it a relevant consideration that the preference of some people involved is based on health considerations while that of others is simply a matter of comfort or convenience?
In cold weather the group favoring the closing of the window
prevails, even if they are a minority. In warm weather the group favoring the opening of the window prevails, even if they are a minority. This rule applies even if the health of members of the opposing side might be adversely affected.
On days with moderate weather the two sides have equal rights,
and must come to a compromise on their own. In this case, if one of the parties involved is guided by personal health considerations, that party prevails.1
Although these rules represent the halachic stand on these
issues, it is always worthwhile for the two opposing parties to come to some sort of peaceful mutual agreement and to show understanding for the other side.
1. The case in the Talmud upon
which this discussion is based is in Bava Basra (22b-23a): Rav Yosef had a neighbor who was a doctor, who used to perform bloodletting (a common medical procedure in those days) in his yard, which was adjacent to Rav Yosefs house. This practice attracted a large number of ravens to the yard, which caused a major disturbance to R Yosef, who was particularly sensitive to the noise (or filth) produced by the birds. The Talmud rules that R Yosef was justified in his demand that the neighbor cease the offensive
practice. This ruling is recorded in the Shulchan Aruch (C.M.
155:39), where the Rema adds that the same law applies to any form of
intolerable nuisance, such as annoyances that are ordinarily bothersome to the average normal person, or to a sick person (if the complainant is ill) -- the one causing the disturbance must cease the offensive activity or do it elsewhere.
In our case, since most people find an open window bothersome in
cold weather -- and a closed window in warm weather -- they do not have to tolerate these inconveniences when a person or a group of people seeks to impose it upon them. The same argument, however, could be advanced just as well by the other party, who sees the open window as a nuisance even though it is a warm day, except for the following consideration:
The Chazon Ish writes that a sick or insomniac person is not within his rights to complain about a neighbors crying child. The reasoning behind this is that anyone who moves into an apartment or a neighborhood does so with the understanding that he will have neighbors and that there are certain normal noises produced by neighbors, one of which is the crying of a baby. The Talmuds ruling does not apply to ordinary nuisances that are a normal part of everyday life. Thus, no complaint can be lodged against people who create a nuisance that is part of the normal
routine of life, such as keeping a window open in the summer and closed in the winter.
In moderate weather, where there is no clear norm to determine which party should prevail in regard to the window, there is no halachic preference to either sides argument. However, in such cases, if one of the parties has a particular sensitivity (such as a health-related issue), this is analogous to the case of R Yosef and the doctor (cited above), and the offending party would have to yield to them. This is because the rights of the offending party are doubtful (because
the weather does not clearly dictate a policy in either direction), while the interest of the sensitive (or ill) party is definitely established (his health stands to deteriorate as a result of the open window). See also above, concerning showing precedence to the concerns of a sick person over a healthy one.