For each sleeping room below the fourth story, at least one window or exterior door
shall remain operable and unobstructed for emergency escape and rescue. Bars, grills,
or screens placed over the opening shall be releasable or removable from the inside
without the use of a key, tool, or force greater than that which is required for normal
operation of a window. If there is more than one window or door in a sleeping room,
the largest and most accessible opening shall be designated for escape and rescue.
Window unit air conditioners may not be installed in a designated escape and rescue
window. For purposes of this section, "sleeping room" shall mean a room used primarily
for sleeping by one or more persons.
