These are those high velocity air streams that blow
across open doorways such as in a mall or casino, so
that things look "open" with doors in the way.
Supposedly they block transfer of inside/outside air
and reduce the heating/cooling load compared to what
a simple opening would create.
I have my doubts.
Anyone have any pointers as to whether these really
do anything useful aside from wasting even more
Knowledge may be power, but communications is the key
Air curtains block flying insects from entering a building. The units
are required by the health department in my county to be installed over
the back doors of restaurants, grocery stores and commercial kitchens
and equipped with a door switch to switch them on whenever the door is
opened. I can only remember one grocery store that had one built in over
the front entrance that ran continuously. I don't see them around
anymore because women complained about their expensive hairdos being
blown away along with freaked out infants and the loose contents of
their shopping carts. ☺
From what I've seen at a resort, they have a double garage door wide
opening for a game room. I don't get blown away, and it's instant summer
relief entering. I see one misused at a local pizza shop. They got that
door thing going while consuming large amounts of air internally going up
the vents, plus window fans. It might help with insects but I doubt it.
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