how to prevent cigarette smoke from entering through a vent - the best room air purifier

Second-
Hand smoke is extremely dangerous and contains more than 40 types of cancer-causing agents. In fact, the U. S.
Second place in environmental protection bureau
Hand smoke in the same dangerous category as asbestos and radon.
Unfortunately, many people who do not smoke, especially those who live in homes with multiple units, suffered a second smoking
Hand smoke infiltrated through vents and other openings in the home.
The only way to stop the smoke from entering through the vent is to block the vent.
It is an easy task;
However, this can cause some inconvenience as you will lose use of specific vents.
Remove the vent grate using a screwdriver.
Place the vent cover at the opening of the vent.
Many are magnetic and stick directly to the inside of the vent.
Seal the edge of the vent cover with tape or adhesive-
Stripping of foam weather (
If the magnetic vent cover is not used, or the magnetic cover does not adequately block the smoke).
Compensate for loss of vent function.
If it is for heating and/or cooling, please add fans, air conditioners and/or heaters to your room.
If the air circulation is reduced, add a window fan.