The solution is a device that uses extremely low-power plasma to create a high-velocity air stream without the need for fans or motors. ???Read moreShow lessCool Solutions for Food- and Beverage-Store Coolers | Clark's Remarkshpac.comRecently, a company in Sarasota, Fla., devised an ???air curtain??? for open-case coolers used in food and beverage stores.1Add a comment...HPAC EngineeringShared pub