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>>> By making the filter electrically heated, rather than heating it from an external source, the researchers said they minimized the amount of heat that escape

>>> By making the filter electrically heated, rather than heating it from an external source, the researchers said they minimized the amount of heat that escaped from the filter, allowing air conditioning to function with minimal strain.

danans 6y ago
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.
mihaaly 6y ago
The minimal mean minimal to other heating alternatives not being insignificant. Air flowing through a hot item will be warmed significantly, this is how electric heaters work!