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Revolving doors are normally composed of three or four doors that revolve around a vertical shaft inside a cylindrical chamber. They are preferred over the regular doors primarily because they hinder air drafts in and out of the building, thus preventing heated or cooled air from escaping to the outdoors. This will obviously represent efficiency in your system, cutting down on your electricity bill.
If the clearance between the doors is relatively small, revolving doors may be used as a security measure to limit entry to one person at a time. A normal door, on the other hand, may allow a second person to drive very closely at another person, bypassing security in the process.
If you are concerned about the cost that regular cleaning and painting of your building entail, then using revolving doors may be a good option for you. You will also save on maintenance, as they have only a few moving parts. What needs to be checked regularly is the lubrication. Furthermore, statistics indicate that the maintenance for revolving doors is only one-fifth as that of swinging doors.
The only apparent problem you have to consider in using revolving doors is when parents with strollers, people in wheelchairs, or people bringing bulky baggage need to enter your building. You may visit Business.com for more information on revolving doors.