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Revolving Doors

Revolving Doors


What's new in revolving doors: can you really teach an old door new tricks?

April 29, 2020

What's new in revolving doors: can you really teach an old door new tricks?

Revolving doors have been around for well over 100 years since their invention by Theophilus Van Kannel in 1888. As the story goes, Van Kannel, working in a lobby during a cold winter in Philadelphia, complained about the unpleasant effects of the swing door at the main entrance: “Every person passing through [the exterior door] first brings a chilling gust of wind with its snow or rain, and the noise of the street; then comes the unwelcome bang!” Van Kannel decided to do something about it. He started a business, and the rest is history. The revolving doors stopped air infiltration and were quiet during use. But, how much can you really improve on what is a relatively simple concept? In fact, modern technology and engineering have completely transformed Van Kannel’s invention in terms of safety, ease of use, and even security. Let’s take a closer look.

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