The Fast-Fold Freezer door gave birth to the idea of a high-speed doors in cold storage environments. It was the first to be used in cooler and freezer applications, and it's time-tested durability and dependability have made it the best selling high-speed door in the cold storage market. Your choice of three different defrost systems assures your Fast-Fold Freezer door will remain virtually frost free, whatever the nature of your cold storage application.