what is the use of overhead airblower at exit and entrance of the shopping mall?

Question

please send ur answers

Answer 1

really?! when i was little i thought the store did it becuase they wnated you to be cool and comtorable in there store!

Answer 2

The air pressure inside the store is higher and you notice the change when you pass through the vestibule. The stores deliberately do this to keep their merchandise and fittings from being sullied by dust drawn in from outside. If the pressure inside is higher, the air will always be flowing out rather than in.

Come to think of, too...I've never seen a bird inside a department store.

Answer 3

It's part of an "air exchange" system for the heating and cooling of the air and, fresh air for the shoppers.
Changing the air like this makes it easier to both heat and cool it with moisture for easier heating and cooling and it's cheaper this way also.

If you notice the hotels and casinos of Las Vegas or any big city buildings, they all have a system like this. You can usually feel the air being circulated.

Answer 4

These blowers cause what is known as an 'air curtain'. The force of air blown down continually is quite efficient in preventing the escape from the building of internal air conditioned air - that is, air that has been treated or air that has been cooled or heated.

Although it is not as good, of course, as a real curtain or a real door, it is useful in doorways with high pedestrian traffic, which makes having a door impractical.

I hope this helps.

Answer 5

It keeps things (especially birds) from getting into the store.