Close the window during the day to evaporate formaldehyde, and open the window at night for ventilation, right?

This is related to the production conditions and volatilization speed of formaldehyde. Closing the window during the day can improve the indoor temperature, formaldehyde is easy to volatilize, and the heating rate becomes faster. But you can't treat people in the middle. You can also plant plants indoors, such as aloe, chlorophytum, Eupatorium odoratum, Eupatorium odoratum, Dendrocalamus japonicus, etc., which can remove harmful substances in the air, especially formaldehyde.