The entrance to the Liverpool Tate Gallery has twin revolving doors, one marked IN, the other marked OUT. Doesn't that kind of defeat the whole point of having revolving doors in the first place?
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The entrance to the Liverpool Tate Gallery has twin revolving doors, one marked IN, the other marked OUT. Doesn't that kind of defeat the whole point of having revolving doors in the first place?
Although two-directional traffic is clearly a benefit of revolving doors, I believe the point of revolving doors was to avoid heat-loss (or gain I suppose). There is never an open passage from the outside to the inside in a revolving door, you see. It is, if you like, a type of continuous air-lock. Indeed, it remains so even if you don't like.