3 ms·

If it's heating the air stream to kill the virus, I don't understand the difference between "electrically heated" and "heating it from another source".

• pcl 6y ago
  I interpreted that to mean that the heating elements are within the structure of the filter, rather than essentially putting the whole thing in an oven.
  • danans 6y ago
    Regardless,how does that prevent the airstream from heating up?
    • lend000 6y ago
      Air molecules are a lot smaller than the particles getting trapped, so presumably a filter with a low enough density can minimize heat transfer except to things getting stuck in it.