3 ms·

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.