Formaldehyde volatilization is a long process. According to a study by Hong Kong Polytechnic University, it takes two years for newly decorated houses to stabilize to the level of old houses.
So in fact, the best way we recommend is to open windows and ventilate regularly. Not only does it work well, but it's completely free. In addition, according to previous experiments conducted by a small enthusiastic partner @Feigosan, the indoor temperature and humidity were artificially raised before ventilation, and the volatilization of formaldehyde in high temperature and humidity environment was accelerated to accelerate the early volatilization of formaldehyde, thereby reducing the concentration of formaldehyde after occupancy and effectively shortening the time of air-conditioning. If the natural ventilation of the house itself is not good, the air circulation fan can be used to artificially enhance air convection.