The development of DurkeeSox application in freezing and refrigerated food industry is basically started from foreign company to domestic company, from big enterprise to small one. After several years of application, DurkeeSox has been fully recognized by owners and building designers. So far, all the famous companies or large chain enterprises have successful applications with durkeeSox system. DurkeeSox has many distinctive advantages in the building of food industry, such as even and comfortable air supply, quick and convenient installation, condensation free, quick installation and cost efficient. DudrkeeSox is sweeping the whole refrigerated food industry, which speed up the upgrading of air dispersion duct in food industry.