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What are these boxed doors outside store fronts in New York?


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In New York around lower Manhattan I saw some storefronts with these boxed doors outside.

What are they called and what is their function?





enter image description here










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    In New York around lower Manhattan I saw some storefronts with these boxed doors outside.

    What are they called and what is their function?





    enter image description here










    share|improve this question







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    aaa is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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      In New York around lower Manhattan I saw some storefronts with these boxed doors outside.

      What are they called and what is their function?





      enter image description here










      share|improve this question







      New contributor




      aaa is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.












      In New York around lower Manhattan I saw some storefronts with these boxed doors outside.

      What are they called and what is their function?





      enter image description here







      new-york-city identify-this






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          That is a sidewalk vestibule. The idea is to have an extra door between the building's interior and the outside, so as to reduce the amount of air exchanged when people go in and out. In winter, warm air stays inside and cold air stays outside, reducing the building's heating costs and avoiding uncomfortable drafts for diners sitting near the door.



          You could also have a vestibule inside the restaurant's regular doors, but that would occupy valuable floor space, and would be useless during warmer seasons. The temporary vestibule can be put up in winter and taken down in summer.






          share|improve this answer
























          • It has something to do with keeping flying insects outside as well.

            – Nean Der Thal
            1 hour ago



















          2














          While I do not know what they are called, their purpose is to keep heat inside by creating an extra air chamber between the inside which is heated and the outside. These are usually removed in the warmer months.






          share|improve this answer
























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            2 Answers
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            active

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            2 Answers
            2






            active

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            active

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            active

            oldest

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            7














            That is a sidewalk vestibule. The idea is to have an extra door between the building's interior and the outside, so as to reduce the amount of air exchanged when people go in and out. In winter, warm air stays inside and cold air stays outside, reducing the building's heating costs and avoiding uncomfortable drafts for diners sitting near the door.



            You could also have a vestibule inside the restaurant's regular doors, but that would occupy valuable floor space, and would be useless during warmer seasons. The temporary vestibule can be put up in winter and taken down in summer.






            share|improve this answer
























            • It has something to do with keeping flying insects outside as well.

              – Nean Der Thal
              1 hour ago
















            7














            That is a sidewalk vestibule. The idea is to have an extra door between the building's interior and the outside, so as to reduce the amount of air exchanged when people go in and out. In winter, warm air stays inside and cold air stays outside, reducing the building's heating costs and avoiding uncomfortable drafts for diners sitting near the door.



            You could also have a vestibule inside the restaurant's regular doors, but that would occupy valuable floor space, and would be useless during warmer seasons. The temporary vestibule can be put up in winter and taken down in summer.






            share|improve this answer
























            • It has something to do with keeping flying insects outside as well.

              – Nean Der Thal
              1 hour ago














            7












            7








            7







            That is a sidewalk vestibule. The idea is to have an extra door between the building's interior and the outside, so as to reduce the amount of air exchanged when people go in and out. In winter, warm air stays inside and cold air stays outside, reducing the building's heating costs and avoiding uncomfortable drafts for diners sitting near the door.



            You could also have a vestibule inside the restaurant's regular doors, but that would occupy valuable floor space, and would be useless during warmer seasons. The temporary vestibule can be put up in winter and taken down in summer.






            share|improve this answer













            That is a sidewalk vestibule. The idea is to have an extra door between the building's interior and the outside, so as to reduce the amount of air exchanged when people go in and out. In winter, warm air stays inside and cold air stays outside, reducing the building's heating costs and avoiding uncomfortable drafts for diners sitting near the door.



            You could also have a vestibule inside the restaurant's regular doors, but that would occupy valuable floor space, and would be useless during warmer seasons. The temporary vestibule can be put up in winter and taken down in summer.







            share|improve this answer












            share|improve this answer



            share|improve this answer










            answered 1 hour ago









            Nate EldredgeNate Eldredge

            23.7k884108




            23.7k884108













            • It has something to do with keeping flying insects outside as well.

              – Nean Der Thal
              1 hour ago



















            • It has something to do with keeping flying insects outside as well.

              – Nean Der Thal
              1 hour ago

















            It has something to do with keeping flying insects outside as well.

            – Nean Der Thal
            1 hour ago





            It has something to do with keeping flying insects outside as well.

            – Nean Der Thal
            1 hour ago













            2














            While I do not know what they are called, their purpose is to keep heat inside by creating an extra air chamber between the inside which is heated and the outside. These are usually removed in the warmer months.






            share|improve this answer




























              2














              While I do not know what they are called, their purpose is to keep heat inside by creating an extra air chamber between the inside which is heated and the outside. These are usually removed in the warmer months.






              share|improve this answer


























                2












                2








                2







                While I do not know what they are called, their purpose is to keep heat inside by creating an extra air chamber between the inside which is heated and the outside. These are usually removed in the warmer months.






                share|improve this answer













                While I do not know what they are called, their purpose is to keep heat inside by creating an extra air chamber between the inside which is heated and the outside. These are usually removed in the warmer months.







                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered 1 hour ago









                ItaiItai

                30.1k972158




                30.1k972158






















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