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Air Purifier specific questions

Originally Posted by
SoCal gunner
The answer to all of those, to a certain extent, is negative pressure. It makes sense to our brains to open a window for fresh air, but if by doing so you create positive pressure in the room, you're going to force the odors into the rest of the house. Have you tried a box fan exhausting air OUT the window?
Yes, I have experienced this. I have run a box fan in an open window, but unless the rest of the window is sealed off, the incoming replacement air that the box fan blows out pushes the smoke to other areas of the house. Counterintuitively, this created a positive pressure rather than a negative pressure.
When you leave the room, I concur with opening the balcony door AND running the filter for a time. The fresh air will ventilate the room faster than the filter can take care of it. The filter helps with any residual smoky air in the room.
Meanwhile, anything you can do to sequester the room from the rest of the dwelling (towels at the bottom of the door, etc) will help. Do this while smoking and have the balcony door cracked a bit. Take a two pronged approach. Additional fresh air will not cause the filter to work harder in double duty, but will help as the smoky air is more diluted. This may prolong the filter life, particularly of the carbon filter. They have a finite amount of odor absorbing capacity.
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Last edited by Nature; 10-15-2025 at 03:14 PM.
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