Studies have shown that when the formaldehyde concentration is slightly higher than the national standard, which is more than 0.1 mg formaldehyde in one cubic meter air, using one square meter of bamboo charcoal, which is about two centimeters thick and under the temperature between 25 degrees Celsius and 35 degrees Celsius, the saturation time of bamboo activated carbon is about 3-8 months. Therefore, the lifetime of active charcoal used to remove formaldehyde is 3-8 months.
When the carbon active used for removing formaldehyde is saturated, it can be exposed to sunlight for 3-5 hours to release the water molecules which occupied the activated carbon space, then the activated charcoal can be continue to be used repeatedly for 3-8 months. According to the above method, it can be used repeatedly 3-8 times.
Placement height of activated carbon: Except that the height is not considered in the cabinet, the height of other spaces putting active carbon should be less than 180 cm. This is because formaldehyde is slightly heavier than air, and it is mainly concentrated in the middle and lower parts of the space, which is exactly the height of the human body.
