What are revolving doors for?

Outside of them being a nuisance I really did not have a clue. So I searched the net and this is what wiki say is the reason for them: A revolving door typically consists of three or four doors that hang on a center shaft and rotate around a vertical axis within a round enclosure. Revolving doors are energy efficient inasmuch as they prevent drafts, thus preventing increases in the heating or cooling required for the building.[1] At the same time, revolving doors allow large numbers of people to pass in and out. Interesting I did not know this.

Energy conservation. When you come in through a revolving door you're not bringing in a burst of cold air (or letting out the cool air in the summer).

I guess it does all of the things that you have mentioned. It looks stylish as well as functional. The one that I most often get through would be the one in Shangrila Mall. I haven't seen other establishments utilizing this kind of entrance. Suppose its only a single opening and security guards would have a challenging time checking those who are coming in? Maybe not as those who are entering and exiting the building would get congested.

Hi Theresaaiza, Well I could be wrong but I doubt it. I 've done a little research on this and if my calculations are correct and my resources reliable and I think they are then the reason behind those annoying revolving doors is that they are designed to confuse and mess with the minds of the brown haired people. Like I said, I could be wrong but probably not.

oh my I have not seen a revolving door in years. I remember one hotel in Rapid City south Dakota that had a revolving doors and I used to love to go through them no matter what the adults would say to me. I was playing of course and really I was probably being really naughty but outside that one I never thought about them after becoming a stuffy old adult. I really have no idea what they are for.

I think it's just for design purposes. However, if one ever gets stuck in it, then good luck. Personally, I've never seen any of these doors in real life except in movies. I would think it's quite fun, lol.

Dear friend, I feel it is a part of development, it simplifies some of the those human manual use. May be some mistakes or problems in the initial stages can be rectified in long run. May it would be a path to other developments or new inventions and findings.

It must have been the style at the time the building was built. I never see them on buildings built in the last 10 or 15 years.

Hi Theresaaiza! Haven't seen you for a while. Hope you weren't 'stuck' in one of those revolving doors. Isn't it funny to watch people use them? Much funnier than when we're being watched going through, eh? If think mostly that revolving doors are a means of minimizing air coming into the building from outside, while at the same time maximizing the flow of people entering and exiting.

I only see the revolving door in the entrance of the commercial trade building or some of the luxury offices. I think it will have its reason why they install the revolving door except for the style. I heard that the revolving doors are supposed to make heating and air conditioning more efficient. In the commercial building or some shopping mall, people enter and leave frequently that the heating or cold air will flow in and out accordingly. To be frankly, I just feel a little dizzy when I enter the revolving door. I concerned that I would be stuck if I did not come out in the right time. And the senior or the kids should be careful while they go through.

I always thought that they were there to hit you in the butt if you weren't moving fast enough ;) Really I am sure that there is a reason for them but I never understood it. The courthouse here in town has them and all they ever did for me was to smack my butt if I wasn't moving fast enough, kind of like saying "Move it mister."

I never experience passing in revolving doors. If I will to come to a building with a revolving door am sure I'll be using it just for experience purposes.lol. So far what I've heard about it's use, is to allow large numbers of people to pass, maybe the one you used was a small revolving door. But I think I would prefer using the simple door because it is easy to pass in and out, hassle free compared to revolving doors.

As many others have commented, it is meant to improve loss of heating or cooling in countries that have very hot summer and cold winter. However, others have used it as fashion statement. Personally though, I found that it is fun for children who loves going through them.

Yes, many people can enter the doors in an orderly fashion, and also the camera can capture good imaging of people. But I do think there is one more reason, and that is the style aspect. It seems more of an artwork when there are revolving doors, as I like the look better than closing doors. Buildings have lots of standards to follow, but these optional doors may be chosen due to a variety of reasons. The best way to find out is to ask building tenants, engineers or the surveillance men, so that you can get better input on such doors.

It may be to slow the traffic flow, and then, perhaps to keep the weather out while people are coming in. I agree, it is prone to get people stuck, if several people are trying to get in at one time.

I used to hate those things when I was a child. I saw someone get stuck in a revolving door once. He tried to step in at the last month and got squished. It stopped the thing of course, so he did get out. But I just don't like them.

Energy efficiency - as the doors revolve, a constant pocket of calm outside air is brought in to the building. Since a seal is maintained, wind is prevented from directly blowing in to the building. The alternative is an air-lock entrance where you'd need to walk through two sets of glass doors in order to enter a building. You'll notice warm air blows down as you enter. This is to mix warmth with the cold air that's built up.

I think these were used to avoid the old fashion doorman who opened the door for you when your arms were full of packages. They have always made me a little uneasy. I don't like tight spaces and of course there was always the chance that someone could trap you in the door space. Now with electric eye doors you won't see the revolving door often.

I did not know their purpose either until one store said to please use them instead of the other doors to conserve energy. I am not sure I buy that explanation, but then I am not an engineer to know the science behind it.

I don't have any idea. I guess it's just for style. If you think about it, you don't have to halt to open revolving doors compared to the usual doors where you have to halt to open it.