noun
air curtain
A device that blows a controlled stream of air across an opening to create an air seal, commonly used at store entrances to keep out insects, dust, and outside air.
スーパーの入り口にエアカーテンが設置されている。
An air curtain is installed at the supermarket entrance.
Variant spelling with a middle dot; less common but still seen.
Loanword from English 'air curtain'.