Our Open Air Merchandisers conform to NSF 7 Type II and are built to withstand 80F ambient temperature - higher than most brands out on the market today. The open, no-door format is made possible by advanced Cold Air Technology that deflects hot ambient air out of the shelf area while trapping cold air inside. The built-in, retractable night curtain is a standard feature that provides extra security and improved energy efficiency when the unit is not in active use. Available in vertical and horizontal styles and various sizes to match any space. Equipped with the Blizzard R290 system, a fully self-contained and detachable condensing unit that uses natural, environmentally friendly, EPA-compliant R290 refrigerant with zero (0) Ozone Depletion Potential (ODP) and three (3) Global Warming Potential (GWP). Blizzard R290 is easily replaceable and requires no on-site brazing.