About the price of Changsha in addition to formaldehyde:
Generally, short-term in addition to formaldehyde method is used for treatment, and the price of primary treatment is usually 20~30 yuan/m3;
A slightly better photocatalyst in addition to formaldehyde treatment, the price of a treatment is usually 35~50 yuan/square;
The imported long-acting in addition to formaldehyde method only needs one-time treatment in the whole house, and the price is slightly expensive, usually 48~60 yuan/square, and the maternal and child-level long-acting in addition to formaldehyde will be higher.