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We can always meet with this kind of phenomenon that we forgot to close the heating installation after doing other things, which lead to the dry of the air indoor. This is bad for our mouth and nose health, and also dries our skin. Even cause low oxygen content and make potential risks. Warm days is designed to solve these problems by seeping sands to burden the source of heat to stop it from working, it controls the speed of sand to realize the time control and shut up the heater in specific time.