甲醛的释放跟温度有着很大的关系，温度越高释放速度也就越快，理论上应该是夏天甲醛浓度更高，但是夏天空气流动较快，加之夏天有开门开窗通风的习惯，反观冬天，则是门窗紧闭，来防止冷空气的进入，所以冬天的甲醛浓度不一定比夏天低。在我国北方大部分地区都有暖气保障室内温度，所以室内气温并不会比夏天低太多，所以甲醛释放速度也不慢。
In fact, the release of formaldehyde has a great relationship with the temperature. The higher the temperature, the faster the release speed. Theoretically, the formaldehyde concentration should be higher in summer, but the air flows faster in summer. In addition, there is the habit of opening doors and windows for ventilation in summer. In contrast, in winter, the doors and windows are closed to prevent the entry of cold air. Therefore, the formaldehyde concentration in winter is not necessarily lower than that in summer. In most areas of northern China, there is heating to ensure the indoor temperature, so the indoor temperature will not be much lower than that in summer, so the release rate of formaldehyde is not slow.