Development in entrance protection eliminates mechanical doors, except for night service or emergency, and allows constant accident free flow of pedestrian or rolling traffic; hermetically sealed entrance is said to be practical for buildings where heavy traffic exists; industrial uses such as sealing freezer rooms having below zero F on inside or 60 to 100 F on outside and separating spaces with different temperatures.


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    Title :

    Entrances are sealed behind air curtain


    Additional title:

    Refrig Eng


    Published in:

    Publication date :

    1956


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English


    Keywords :


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