Experiment:measurement of air purification effect

    It can be seen from the above picture that the fresh system and the indoor purifier can reduce the value of PM2.5 effectively.

    There are 4 people stay in the dormitory above the picture,4 square meters per capita.When they close the door and window at 23:00 before they go to sleep ,the value of CO2 have raised by 1000 PPM in 2 hours.However,the CO2 of the room with purifier has been maintaied at a healthy level.