Is the gas produced by the nitrogen generator hot or cold?

No, it is cold. Nitrogen generator is a kind of equipment to extract nitrogen from air. It compresses air and then separates nitrogen from oxygen through cooling and separation, thus producing pure nitrogen. In this process, nitrogen will be cooled, because the gas will become hot after being compressed, and then it will be cooled back in the cooler, and finally cold nitrogen will be formed. Cold nitrogen can be used for many purposes, such as gas protection, gas fire extinguishing, food packaging, medical use and so on.