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The next logical step is make an air filter that positively pressurizes the house, with air conditioned air.
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That could be an overpressure fan; with an air conditioner set to recirculate. [Could it not?]
I got 6ea 14x14x1 filters for Corona-chan, but they came in handy for the 2020 election-cycle firestorm. I've gone through four of them so far.