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What if the ventilation is not good at home?
Home ventilation is not good, if the economic conditions are good, you can install an air conditioning or intelligent fresh air system in the room. The fresh air system has powerful functions, which can monitor the concentration of carbon dioxide in the house, ventilate in time when it does not meet the standards, and add moisture to the air to increase indoor humidity. In fact, the best way to ventilate is to open windows. In daily life, if it is not a north-south permeable house, after opening a window, we should also open other windows to keep the wind flowing.