Editing Revolving door (section)

{{Short description|Set of doors that rotate about a vertical shaft}}
{{Other uses}}
{{More citations needed|date=April 2024}}
[[File:Revolving Door.jpg|thumb|upright|A revolving door in [[Turkey]] (counter-clockwise rotation)]]

A '''revolving door''' typically consists of three or four doors that hang on a central shaft and rotate around a vertical axis within a cylindrical enclosure. To use a revolving door, a person enters the enclosure between two of the doors and then moves continuously to the desired exit while keeping pace with the doors.

Revolving doors were designed to relieve the immense pressure caused by air rushing through high-rise buildings (referred to as [[stack effect]] pressure) while at the same time allowing large numbers of people to pass in and out. They are also energy efficient; they act as an [[airlock]] to prevent drafts, decreasing the loss of heating or cooling for the building as compared to a standard door.<ref>[http://sustainability.mit.edu/projects/revolving-doors Revolving Doors - Sustainability @ MIT] {{webarchive|url=https://web.archive.org/web/20090906201519/http://sustainability.mit.edu/projects/revolving-doors |date=2009-09-06 }}</ref>