3 ms·
>Presumably smaller particles are also more difficult to filter So, that may or may not be true for just passive filtering (like door and window frames), but i
by LordDragonfang 2y ago
>Presumably smaller particles are also more difficult to filter
So, that may or may not be true for just passive filtering (like door and window frames), but it's actually not true for actual hepa-style filters, because the physics of particulate filtering is totally unintuitive from the macro level -- past a certain point, finer particulates actually become easier to filter, because the physics is dominated by two different effects at different sizes.
https://dynomight.net/ikea-purifier/#on-physics https://dynomight.net/ikea-purifier/#on-physics
- tsimionescu 2y agoI don't think it's all that un intuitive, as long as you know that there is an electrostatic effect used for filtering. We all know that it's easier to attract a lighter object with an electrostatically charged ruler, so it's quite easy to imagine that very fine (so, light) particles are easier to to attract than larger heavier ones as well.