Problem Explanation：
This phenomenon is a normal physical phenomenon, the use of convection in the market heating heaters have this phenomenon, not a product quality problem.Mi Smart Space Heater adopts the convection heating mode, the bottom heating air makes it rise along the vertical air duct, and at the same time presses the cold air to flow downward, forming air convection and circulating heating indoor air.Because the machine is placed indoors, the fuselage and the ground will inevitably fall particles and so on. Convection caused by heating in electric heaters speeds up the flow of indoor particulate matter, leading to higher PM2.5 levels.