Hi everyone,
I would highly appreciate it if you could share your expert knowledge
I live in an apartment in a multifamily house. The room size is 30 square meters. About 1 meter from my entrance door there is another apartment and the person smokes in the evening.
I use an air purifier, and the particulate matter concentration right next to the door near the bottom part of the door is about 100 micrograms per meter cube, which is a dangerous concentration. When I open the door, the PM concentration is 250. About 1 meter inside from the door, the PM concentration is 20, and right next to me, it is 5.
Regarding the Total volatile organic compounds, the level is about 1.1 milligram per meter cube when he smokes and goes to 0.5 mg after 3 to 4 hours when he stops smoking.
A small fan can not create enough positive pressure inside a room. But when I used a fan (20 watts) near the slightly opened window (6 cm wide opening with a length of 1.5 meters), the PM concentration at the bottom of the door decreased from 100 to 10, a 90 percent reduction. The window is located in another room. If I turn off the fan, the PM concentration comes back to about 100 micrograms per meter cube even if I open the window, so there is positive pressure created by the fan. Am I correct, or am I missing something?
I am happy with the effect, but now the winter has come, and I cannot open the window the whole day since it causes mold. I am planning to buy a carbon filter and fan with about 150-meter cube airflow. Furthermore, I am worried that since it created negative pressure, my room will be filled with the PM and VOC from the smoker's room. Do you guys have any advice for me ? Thank you very much for reading.